System.IO.FileSystem

Exposes static methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited.

Creates all directories and subdirectories in the specified path unless they already exist.

The directory to create. The directory specified by is a file. -or- The network name is not known. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using the method. -or- is prefixed with, or contains, only a colon character (:). is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). contains a colon character (:) that is not part of a drive label ("C:\"). An object that represents the directory at the specified path. This object is returned regardless of whether a directory at the specified path already exists.

Deletes an empty directory from a specified path.

The name of the empty directory to remove. This directory must be writable and empty. A file with the same name and location specified by exists. -or- The directory is the application's current working directory. -or- The directory specified by is not empty. -or- The directory is read-only or contains a read-only file. -or- The directory is being used by another process. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using the method. is . The specified path, file name, or both exceed the system-defined maximum length. does not exist or could not be found. -or- The specified path is invalid (for example, it is on an unmapped drive).

Deletes the specified directory and, if indicated, any subdirectories and files in the directory.

The name of the directory to remove. to remove directories, subdirectories, and files in ; otherwise, . A file with the same name and location specified by exists. -or- The directory specified by is read-only, or is and is not an empty directory. -or- The directory is the application's current working directory. -or- The directory contains a read-only file. -or- The directory is being used by another process. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using the method. is . The specified path, file name, or both exceed the system-defined maximum length. does not exist or could not be found. -or- The specified path is invalid (for example, it is on an unmapped drive).

Returns an enumerable collection of directory full names in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. is . is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of the full names (including paths) for the directories in the directory specified by .

Returns an enumerable collection of directory full names that match a search pattern in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of directories in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters with the method. -or- does not contain a valid pattern. is . -or- is . is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of the full names (including paths) for the directories in the directory specified by and that match the specified search pattern.

Returns an enumerable collection of the directory full names that match a search pattern in a specified path, and optionally searches subdirectories.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of directories in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. or is . is not a valid value. is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of the full names (including paths) for the directories in the directory specified by and that match the specified search pattern and enumeration options.

Returns an enumerable collection of directory full names that match a search pattern in a specified path, and optionally searches subdirectories.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of directories in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or should include all subdirectories. The default value is . is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. is . -or- is . is not a valid value. is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of the full names (including paths) for the directories in the directory specified by and that match the specified search pattern and search option.

Returns an enumerable collection of full file names in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. is . is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of the full names (including paths) for the files in the directory specified by .

Returns an enumerable collection of full file names that match a search pattern in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of files in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. is . -or- is . is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of the full names (including paths) for the files in the directory specified by and that match the specified search pattern.

Returns an enumerable collection of full file names that match a search pattern and enumeration options in a specified path, and optionally searches subdirectories.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of files in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. is . -or- is . is not a valid value. is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. An enumerable collection of the full names (including paths) for the files in the directory specified by and that match the specified search pattern and enumeration options.

Returns an enumerable collection of full file names that match a search pattern in a specified path, and optionally searches subdirectories.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of files in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or should include all subdirectories. The default value is . is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. is . -or- is . is not a valid value. is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of the full names (including paths) for the files in the directory specified by and that match the specified search pattern and search option.

Returns an enumerable collection of file names and directory names in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. is . is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of file-system entries in the directory specified by .

Returns an enumerable collection of file names and directory names that match a search pattern in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of file-system entries in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. is . -or- is . is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of file-system entries in the directory specified by and that match the specified search pattern.

Returns an enumerable collection of file names and directory names that match a search pattern and enumeration options in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of subdirectories in . This parameter can contain a combination of valid literal and wildcard characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. is . -or- is . is not a valid value. is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of file-system entries in the directory specified by , that match the specified search pattern and the specified enumeration options.

Returns an enumerable collection of file names and directory names that match a search pattern in a specified path, and optionally searches subdirectories.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against file-system entries in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or should include all subdirectories. The default value is . is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. is . -or- is . is not a valid value. is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An enumerable collection of file-system entries in the directory specified by and that match the specified search pattern and option.

Determines whether the given path refers to an existing directory on disk.

The path to test. if refers to an existing directory; if the directory does not exist or an error occurs when trying to determine if the specified directory exists.

Gets the creation date and time of a directory.

The path of the directory. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using the method. is . The specified path, file name, or both exceed the system-defined maximum length. A structure that is set to the creation date and time for the specified directory. This value is expressed in local time.

Gets the creation date and time, in Coordinated Universal Time (UTC) format, of a directory.

The path of the directory. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using the method. is . The specified path, file name, or both exceed the system-defined maximum length. A structure that is set to the creation date and time for the specified directory. This value is expressed in UTC time.

Gets the current working directory of the application.

The caller does not have the required permission. The operating system is Windows CE, which does not have current directory functionality. This method is available in the .NET Compact Framework, but is not currently supported. A string that contains the absolute path of the current working directory, and does not end with a backslash (\).

Returns the names of subdirectories (including their paths) in the specified directory.

The relative or absolute path to the directory to search. This string is not case-sensitive. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using the method. is . The specified path, file name, or both exceed the system-defined maximum length. is a file name. The specified path is invalid (for example, it is on an unmapped drive). An array of the full names (including paths) of subdirectories in the specified path, or an empty array if no directories are found.

Returns the names of subdirectories (including their paths) that match the specified search pattern in the specified directory.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of subdirectories in . This parameter can contain a combination of valid literal and wildcard characters, but it doesn't support regular expressions. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using . -or- doesn't contain a valid pattern. or is . The specified path, file name, or both exceed the system-defined maximum length. is a file name. The specified path is invalid (for example, it is on an unmapped drive). An array of the full names (including paths) of the subdirectories that match the search pattern in the specified directory, or an empty array if no directories are found.

Returns the names of subdirectories (including their paths) that match the specified search pattern and enumeration options in the specified directory.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of subdirectories in . This parameter can contain a combination of valid literal and wildcard characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using . -or- doesn't contain a valid pattern. or is . The specified path, file name, or both exceed the system-defined maximum length. is a file name. The specified path is invalid (for example, it is on an unmapped drive). An array of the full names (including paths) of the subdirectories that match the search pattern and enumeration options in the specified directory, or an empty array if no directories are found.

Returns the names of the subdirectories (including their paths) that match the specified search pattern in the specified directory, and optionally searches subdirectories.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of subdirectories in . This parameter can contain a combination of valid literal and wildcard characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include all subdirectories or only the current directory. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. or is . is not a valid value. The caller does not have the required permission. The specified path, file name, or both exceed the system-defined maximum length. is a file name. The specified path is invalid (for example, it is on an unmapped drive). An array of the full names (including paths) of the subdirectories that match the specified criteria, or an empty array if no directories are found.

Returns the volume information, root information, or both for the specified path.

The path of a file or directory. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with . is . The specified path, file name, or both exceed the system-defined maximum length. A string that contains the volume information, root information, or both for the specified path.

Returns the names of files (including their paths) in the specified directory.

The relative or absolute path to the directory to search. This string is not case-sensitive. is a file name. -or- A network error has occurred. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using the method. is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is not found or is invalid (for example, it is on an unmapped drive). An array of the full names (including paths) for the files in the specified directory, or an empty array if no files are found.

Returns the names of files (including their paths) that match the specified search pattern in the specified directory.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of files in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. is a file name. -or- A network error has occurred. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using . -or- doesn't contain a valid pattern. or is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is not found or is invalid (for example, it is on an unmapped drive). An array of the full names (including paths) for the files in the specified directory that match the specified search pattern, or an empty array if no files are found.

Returns the names of files (including their paths) that match the specified search pattern and enumeration options in the specified directory.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of subdirectories in . This parameter can contain a combination of valid literal and wildcard characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. is a file name. -or- A network error has occurred. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters by using . -or- doesn't contain a valid pattern. or is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is not found or is invalid (for example, it is on an unmapped drive). An array of the full names (including paths) for the files in the specified directory that match the specified search pattern and enumeration options, or an empty array if no files are found.

Returns the names of files (including their paths) that match the specified search pattern in the specified directory, using a value to determine whether to search subdirectories.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of files in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include all subdirectories or only the current directory. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. -or- does not contain a valid pattern. or is . is not a valid value. The caller does not have the required permission. The specified path is not found or is invalid (for example, it is on an unmapped drive). The specified path, file name, or both exceed the system-defined maximum length. is a file name. -or- A network error has occurred. An array of the full names (including paths) for the files in the specified directory that match the specified search pattern and option, or an empty array if no files are found.

Returns the names of all files and subdirectories in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with . is . The specified path, file name, or both exceed the system-defined maximum length. is a file name. The specified path is invalid (for example, it is on an unmapped drive). An array of the names of files and subdirectories in the specified directory, or an empty array if no files or subdirectories are found.

Returns an array of file names and directory names that match a search pattern in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of file and directories in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. -or- does not contain a valid pattern. or is . The specified path, file name, or both exceed the system-defined maximum length. is a file name. The specified path is invalid (for example, it is on an unmapped drive). An array of file names and directory names that match the specified search criteria, or an empty array if no files or directories are found.

Returns an array of file names and directory names that match a search pattern and enumeration options in a specified path.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of subdirectories in . This parameter can contain a combination of valid literal and wildcard characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. -or- does not contain a valid pattern. or is . The specified path, file name, or both exceed the system-defined maximum length. is a file name. The specified path is invalid (for example, it is on an unmapped drive). An array of file names and directory names that match the specified search pattern and enumeration options, or an empty array if no files or directories are found.

Returns an array of all the file names and directory names that match a search pattern in a specified path, and optionally searches subdirectories.

The relative or absolute path to the directory to search. This string is not case-sensitive. The search string to match against the names of files and directories in . This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or should include all subdirectories. The default value is . is a zero-length string, contains only white space, or contains invalid characters. You can query for invalid characters by using the method. -or- does not contain a valid pattern. is . -or- is . is not a valid value. is invalid, such as referring to an unmapped drive. is a file name. The specified path, file name, or combined exceed the system-defined maximum length. The caller does not have the required permission. The caller does not have the required permission. An array of file the file names and directory names that match the specified search criteria, or an empty array if no files or directories are found.

Returns the date and time the specified file or directory was last accessed.

The file or directory for which to obtain access date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The parameter is in an invalid format. A structure that is set to the date and time the specified file or directory was last accessed. This value is expressed in local time.

Returns the date and time, in Coordinated Universal Time (UTC) format, that the specified file or directory was last accessed.

The file or directory for which to obtain access date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The parameter is in an invalid format. A structure that is set to the date and time the specified file or directory was last accessed. This value is expressed in UTC time.

Returns the date and time the specified file or directory was last written to.

The file or directory for which to obtain modification date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. A structure that is set to the date and time the specified file or directory was last written to. This value is expressed in local time.

Returns the date and time, in Coordinated Universal Time (UTC) format, that the specified file or directory was last written to.

The file or directory for which to obtain modification date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. A structure that is set to the date and time the specified file or directory was last written to. This value is expressed in UTC time.

Retrieves the names of the logical drives on this computer in the form "<drive letter>:\".

An I/O error occurred (for example, a disk error). The caller does not have the required permission. The logical drives on this computer.

Retrieves the parent directory of the specified path, including both absolute and relative paths.

The path for which to retrieve the parent directory. The directory specified by is read-only. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. For more information, see the topic. The specified path was not found. is in an invalid format. .NET Framework only: The caller does not have the required permissions. The parent directory, or if is the root directory, including the root of a UNC server or share name.

Moves a file or a directory and its contents to a new location.

The path of the file or directory to move. The path to the new location for . If is a file, then must also be a file name. An attempt was made to move a directory to a different volume. -or- already exists. See the Note in the Remarks section. -or- The and parameters refer to the same file or directory. -or- The directory or a file within it is being used by another process. The caller does not have the required permission. or is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. or is . The specified path, file name, or both exceed the system-defined maximum length. The path specified by is invalid (for example, it is on an unmapped drive).

Sets the creation date and time for the specified file or directory.

The file or directory for which to set the creation date and time information. The date and time the file or directory was last written to. This value is expressed in local time. The specified path was not found. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The caller does not have the required permission. specifies a value outside the range of dates or times permitted for this operation. The current operating system is not Windows NT or later.

Sets the creation date and time, in Coordinated Universal Time (UTC) format, for the specified file or directory.

The file or directory for which to set the creation date and time information. The date and time the directory or file was created. This value is expressed in local time. The specified path was not found. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The caller does not have the required permission. specifies a value outside the range of dates or times permitted for this operation. The current operating system is not Windows NT or later.

Sets the application's current working directory to the specified directory.

The path to which the current working directory is set. An I/O error occurred. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The caller does not have the required permission to access unmanaged code. The specified path was not found. The specified directory was not found.

Sets the date and time the specified file or directory was last accessed.

The file or directory for which to set the access date and time information. An object that contains the value to set for the access date and time of . This value is expressed in local time. The specified path was not found. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The caller does not have the required permission. The current operating system is not Windows NT or later. specifies a value outside the range of dates or times permitted for this operation.

Sets the date and time, in Coordinated Universal Time (UTC) format, that the specified file or directory was last accessed.

The file or directory for which to set the access date and time information. An object that contains the value to set for the access date and time of . This value is expressed in UTC time. The specified path was not found. is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The caller does not have the required permission. The current operating system is not Windows NT or later. specifies a value outside the range of dates or times permitted for this operation.

Sets the date and time a directory was last written to.

The path of the directory. The date and time the directory was last written to. This value is expressed in local time. was not found (for example, the directory doesn't exist or it is on an unmapped drive). was not found (for example, the directory doesn't exist or it is on an unmapped drive). is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The caller does not have the required permission. The current operating system is not Windows NT or later. specifies a value outside the range of dates or times permitted for this operation.

Sets the date and time, in Coordinated Universal Time (UTC) format, that a directory was last written to.

The path of the directory. The date and time the directory was last written to. This value is expressed in UTC time. was not found (for example, the directory doesn't exist or it is on an unmapped drive). was not found (for example, the directory doesn't exist or it is on an unmapped drive). is a zero-length string, contains only white space, or contains one or more invalid characters. You can query for invalid characters with the method. is . The specified path, file name, or both exceed the system-defined maximum length. The caller does not have the required permission. The current operating system is not Windows NT or later. specifies a value outside the range of dates or times permitted for this operation.

Exposes instance methods for creating, moving, and enumerating through directories and subdirectories. This class cannot be inherited.

Initializes a new instance of the class on the specified path.

A string specifying the path on which to create the . is . The caller does not have the required permission. contains invalid characters such as ", <, >, or |. The specified path, file name, or both exceed the system-defined maximum length.

Creates a directory.

The directory cannot be created.

Creates a subdirectory or subdirectories on the specified path. The specified path can be relative to this instance of the class.

The specified path. This cannot be a different disk volume or Universal Naming Convention (UNC) name. does not specify a valid file path or contains invalid characters. is . The specified path is invalid, such as being on an unmapped drive. The subdirectory cannot be created. -or- A file or directory already has the name specified by . The specified path, file name, or both exceed the system-defined maximum length. The caller does not have code access permission to create the directory. -or- The caller does not have code access permission to read the directory described by the returned object. This can occur when the parameter describes an existing directory. contains a colon character (:) that is not part of a drive label ("C:\"). The last directory specified in .

Deletes this if it is empty.

The directory contains a read-only file. The directory described by this object does not exist or could not be found. The directory is not empty. -or- The directory is the application's current working directory. -or- There is an open handle on the directory, and the operating system is Windows XP or earlier. This open handle can result from enumerating directories. For more information, see How to: Enumerate Directories and Files. The caller does not have the required permission.

Deletes this instance of a , specifying whether to delete subdirectories and files.

to delete this directory, its subdirectories, and all files; otherwise, . The directory contains a read-only file. The directory described by this object does not exist or could not be found. The directory is read-only. -or- The directory contains one or more files or subdirectories and is . -or- The directory is the application's current working directory. -or- There is an open handle on the directory or on one of its files, and the operating system is Windows XP or earlier. This open handle can result from enumerating directories and files. For more information, see How to: Enumerate Directories and Files. The caller does not have the required permission.

Returns an enumerable collection of directory information in the current directory.

The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of directories in the current directory.

Returns an enumerable collection of directory information that matches a specified search pattern.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. is . The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of directories that matches .

Returns an enumerable collection of directory information that matches the specified search pattern and enumeration options.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. is . The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of directories that matches and .

Returns an enumerable collection of directory information that matches a specified search pattern and search subdirectory option.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. The default value is . is . is not a valid value. The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of directories that matches and .

Returns an enumerable collection of file information in the current directory.

The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of the files in the current directory.

Returns an enumerable collection of file information that matches a search pattern.

The search string to match against the names of files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. is . The path encapsulated in the object is invalid, (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of files that matches .

Returns an enumerable collection of file information that matches the specified search pattern and enumeration options.

The search string to match against the names of files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. is . The path encapsulated in the object is invalid, (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of files that matches and .

Returns an enumerable collection of file information that matches a specified search pattern and search subdirectory option.

The search string to match against the names of files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. The default value is . is . is not a valid value. The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of files that matches and .

Returns an enumerable collection of file system information in the current directory.

The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of file system information in the current directory.

Returns an enumerable collection of file system information that matches a specified search pattern.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. is . The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of file system information objects that matches .

Returns an enumerable collection of file system information that matches the specified search pattern and enumeration options.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. is . The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of file system information objects that matches and .

Returns an enumerable collection of file system information that matches a specified search pattern and search subdirectory option.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. The default value is . is . is not a valid value. The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An enumerable collection of file system information objects that matches and .

Returns the subdirectories of the current directory.

The path encapsulated in the object is invalid, such as being on an unmapped drive. The caller does not have the required permission. The caller does not have the required permission. An array of objects.

Returns an array of directories in the current matching the given search criteria.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. contains one or more invalid characters defined by the method. is . The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of type matching .

Returns an array of directories in the current matching the specified search pattern and enumeration options.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. contains one or more invalid characters defined by the method. is . The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of type matching and .

Returns an array of directories in the current matching the given search criteria and using a value to determine whether to search subdirectories.

The search string to match against the names of directories. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. contains one or more invalid characters defined by the method. is . is not a valid value. The path encapsulated in the object is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of type matching .

Returns a file list from the current directory.

The path is invalid, such as being on an unmapped drive. An array of type .

Returns a file list from the current directory matching the given search pattern.

The search string to match against the names of files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. contains one or more invalid characters defined by the method. is . The path is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of type .

Returns a file list from the current directory matching the specified search pattern and enumeration options.

The search string to match against the names of files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. contains one or more invalid characters defined by the method. is . The path is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of strongly typed objects that match and .

Returns a file list from the current directory matching the given search pattern and using a value to determine whether to search subdirectories.

The search string to match against the names of files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. contains one or more invalid characters defined by the method. is . is not a valid value. The path is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of type .

Returns an array of strongly typed entries representing all the files and subdirectories in a directory.

The path is invalid (for example, it is on an unmapped drive). An array of strongly typed entries.

Retrieves an array of strongly typed objects representing the files and subdirectories that match the specified search criteria.

The search string to match against the names of directories and files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. contains one or more invalid characters defined by the method. is . The specified path is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of strongly typed objects matching the search criteria.

Retrieves an array of strongly typed objects representing the files and subdirectories that match the specified search pattern and enumeration options.

The search string to match against the names of directories and files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. An object that describes the search and enumeration configuration to use. contains one or more invalid characters defined by the method. is . The specified path is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of strongly typed objects matching and .

Retrieves an array of objects that represent the files and subdirectories matching the specified search criteria.

The search string to match against the names of directories and files. This parameter can contain a combination of valid literal path and wildcard (* and ?) characters, but it doesn't support regular expressions. One of the enumeration values that specifies whether the search operation should include only the current directory or all subdirectories. The default value is . contains one or more invalid characters defined by the method. is . is not a valid value. The specified path is invalid (for example, it is on an unmapped drive). The caller does not have the required permission. An array of file system entries that match the search criteria.

Moves a instance and its contents to a new path.

The name and path to which to move this directory. The destination cannot be another disk volume or a directory with the identical name. It can be an existing directory to which you want to add this directory as a subdirectory. is . is an empty string (''"). An attempt was made to move a directory to a different volume. -or- already exists. -or- You are not authorized to access this path. -or- The directory being moved and the destination directory have the same name. The caller does not have the required permission. The destination directory cannot be found.

Returns the original path that was passed to the constructor. Use the or properties for the full path or file/directory name instead of this method.

The original path that was passed by the user.

Gets a value indicating whether the directory exists.

if the directory exists; otherwise, .

Gets the name of this instance.

The directory name.

Gets the parent directory of a specified subdirectory.

The caller does not have the required permission. The parent directory, or if the path is null or if the file path denotes a root (such as \, C:\, or \\server\share).

Gets the root portion of the directory.

The caller does not have the required permission. An object that represents the root of the directory.

Provides a lower level view of to help process and filter find results.

Converts the value of this instance to a .

The value of this instance as a .

Returns the full path of the find result.

A string representing the full path.

Returns the full path for the find results, based on the initially provided path.

A string representing the full path.

Gets the attributes for this entry.

The attributes for this entry.

Gets the creation time for the entry or the oldest available time stamp if the operating system does not support creation time stamps.

The creation time for the entry.

Gets the full path of the directory this entry resides in.

The full path of this entry's directory.

Gets the file name for this entry.

This entry's file name.

Gets a value that indicates whether this entry is a directory.

if the entry is a directory; otherwise, .

Gets a value that indicates whether the file has the hidden attribute.

if the file has the hidden attribute; otherwise, .

Gets a datetime offset that represents the last access time in UTC.

The last access time in UTC.

Gets a datetime offset that represents the last write time in UTC.

The last write time in UTC.

Gets the length of the file, in bytes.

The file length in bytes.

Gets the root directory for the enumeration as specified in the constructor.

The original root directory.

Gets the full path of the root directory used for the enumeration.

The root directory.

Allows utilizing custom filter predicates and transform delegates for enumeration purposes.

The type that this enumerable encapsulates.

Initializes a new instance of the class with specific search and filtering options.

The path of the directory where the enumeration will be performed. A delegate method for transforming raw find data into a result. An object describing the enumeration options. or is . The path is empty. -or- contains a null character "\0".

Retrieves the enumerator for this type of result.

An enumerator.

Gets an enumerator that can be used to iterate.

An enumerator instance.

Gets or sets the predicate that can be used to verify if the TResults should be included.

The include predicate.

Gets or sets the predicate that can be used to verify if the TResults should be recursed.

The recurse predicate.

Encapsulates a method for filtering out find results.

A reference to the file system entry that will be evaluated with the predicate condition. if the predicate condition is met; otherwise, .

Encapsulates a method for transforming raw find data into a result.

A reference to the file system entry that will be evaluated with the predicate condition. An instance of the type that this delegate encapsulates.

Enumerates the file system elements of the provided type that are being searched and filtered by a .

The type of the result produced by this file system enumerator.

Encapsulates a find operation.

The directory to search in. Enumeration options to use.

When overriden in a derived class, returns a value that indicates whether to continue execution or throw the default exception.

The native error code. to continue; to throw the default exception for the given error.

Releases the resources used by the current instance of the class.

When overridden in a derived class, releases the unmanaged resources used by the class and optionally releases the managed resources.

to release both managed and unmanaged resources; to release only unmanaged resources.

Advances the enumerator to the next item of the .

if the enumerator successfully advanced to the next item; if the end of the enumerator has been passed.

When overriden in a derived class, this method is called whenever the end of a directory is reached.

The directory path as a read-only span.

Always throws .

When overridden in a derived class, determines whether the specified file system entry should be included in the results.

A file system entry reference. if the specified file system entry should be included in the results; otherwise, .

When overridden in a derived class, determines whether the specified file system entry should be recursed.

A file system entry reference. if the specified directory entry should be recursed into; otherwise, .

When overridden in a derived class, generates the result type from the current entry.

A file system entry reference. The result type from the current entry.

Gets the currently visited element.

The currently visited element.

Gets the currently visited object.

The currently visited object.

Provides methods for matching file system names.

Verifies if the given expression matches the given name. Supports the following wildcards: '*' and '?'. The backslash character '\' escapes.

The expression to match with. The name to check against the expression. to ignore case (default); if the match should be case-sensitive. if the given expression matches the given name; otherwise, .

Verifies if the given Win32 expression matches the given name. Supports the following wildcards: '*', '?', '<', '>', '"'. The backslash character '\' escapes.

The expression to match with, such as "*.foo". The name to check against the expression. to ignore case (default), if the match should be case-sensitive. if the given expression matches the given name; otherwise, .

Translates the given Win32 expression. Change '*' and '?' to '<', '>' and '"' to match Win32 behavior.

The expression to translate. A string with the translated Win32 expression.

Provides file and directory enumeration options.

Initializes a new instance of the class with the recommended default options.

Gets or sets the attributes to skip. The default is FileAttributes.Hidden | FileAttributes.System.

The attributes to skip.

Gets or sets the suggested buffer size, in bytes. The default is 0 (no suggestion).

The buffer size.

Gets or sets a value that indicates whether to skip files or directories when access is denied (for example, or ). The default is .

to skip innacessible files or directories; otherwise, .

Gets or sets the case matching behavior.

One of the enumeration values that indicates the case matching behavior.

Gets or sets the match type.

One of the enumeration values that indicates the match type.

Gets or sets a value that indicates whether to recurse into subdirectories while enumerating. The default is .

to recurse into subdirectories; otherwise, .

Gets or sets a value that indicates whether to return the special directory entries "." and "..".

to return the special directory entries "." and ".."; otherwise, .

Provides static methods for the creation, copying, deletion, moving, and opening of a single file, and aids in the creation of objects.

Appends lines to a file, and then closes the file. If the specified file does not exist, this method creates a file, writes the specified lines to the file, and then closes the file.

The file to append the lines to. The file is created if it doesn't already exist. The lines to append to the file. is a zero-length string, contains only white space, or contains one more invalid characters defined by the method. Either or is . is invalid (for example, the directory doesn't exist or it is on an unmapped drive). The file specified by was not found. An I/O error occurred while opening the file. exceeds the system-defined maximum length. is in an invalid format. The caller does not have permission to write to the file. specifies a file that is read-only. -or- This operation is not supported on the current platform. -or- is a directory.

Appends lines to a file by using a specified encoding, and then closes the file. If the specified file does not exist, this method creates a file, writes the specified lines to the file, and then closes the file.

The file to append the lines to. The file is created if it doesn't already exist. The lines to append to the file. The character encoding to use. is a zero-length string, contains only white space, or contains one more invalid characters defined by the method. Either , , or is . is invalid (for example, the directory doesn't exist or it is on an unmapped drive). The file specified by was not found. An I/O error occurred while opening the file. exceeds the system-defined maximum length. is in an invalid format. The caller does not have the required permission. specifies a file that is read-only. -or- This operation is not supported on the current platform. -or- is a directory. -or- The caller does not have the required permission.

Asynchronously appends lines to a file by using a specified encoding, and then closes the file. If the specified file does not exist, this method creates a file, writes the specified lines to the file, and then closes the file.

The file to append the lines to. The file is created if it doesn't already exist. The lines to append to the file. The character encoding to use. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous append operation.

Asynchronously appends lines to a file, and then closes the file. If the specified file does not exist, this method creates a file, writes the specified lines to the file, and then closes the file.

The file to append the lines to. The file is created if it doesn't already exist. The lines to append to the file. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous append operation.

Opens a file, appends the specified string to the file, and then closes the file. If the file does not exist, this method creates a file, writes the specified string to the file, then closes the file.

The file to append the specified string to. The string to append to the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, the directory doesn't exist or it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. is in an invalid format. The caller does not have the required permission.

Appends the specified string to the file using the specified encoding, creating the file if it does not already exist.

The file to append the specified string to. The string to append to the file. The character encoding to use. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, the directory doesn't exist or it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. is in an invalid format. The caller does not have the required permission.

Asynchronously opens a file or creates the file if it does not already exist, appends the specified string to the file using the specified encoding, and then closes the file.

The file to append the specified string to. The string to append to the file. The character encoding to use. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous append operation.

Asynchronously opens a file or creates a file if it does not already exist, appends the specified string to the file, and then closes the file.

The file to append the specified string to. The string to append to the file. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous append operation.

Creates a that appends UTF-8 encoded text to an existing file, or to a new file if the specified file does not exist.

The path to the file to append to. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, the directory doesn't exist or it is on an unmapped drive). is in an invalid format. A stream writer that appends UTF-8 encoded text to the specified file or to a new file.

Copies an existing file to a new file. Overwriting a file of the same name is not allowed.

The file to copy. The name of the destination file. This cannot be a directory or an existing file. The caller does not have the required permission. or is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . -or- or specifies a directory. or is . The specified path, file name, or both exceed the system-defined maximum length. The path specified in or is invalid (for example, it is on an unmapped drive). was not found. exists. -or- An I/O error has occurred. or is in an invalid format.

Copies an existing file to a new file. Overwriting a file of the same name is allowed.

The file to copy. The name of the destination file. This cannot be a directory. if the destination file can be overwritten; otherwise, . The caller does not have the required permission. -or- is read-only. -or- is , exists and is hidden, but is not hidden. or is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . -or- or specifies a directory. or is . The specified path, file name, or both exceed the system-defined maximum length. The path specified in or is invalid (for example, it is on an unmapped drive). was not found. exists and is . -or- An I/O error has occurred. or is in an invalid format.

Creates or overwrites a file in the specified path.

The path and name of the file to create. The caller does not have the required permission. -or- specified a file that is read-only. -or- specified a file that is hidden. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while creating the file. is in an invalid format. A that provides read/write access to the file specified in .

Creates or overwrites a file in the specified path, specifying a buffer size.

The path and name of the file to create. The number of bytes buffered for reads and writes to the file. The caller does not have the required permission. -or- specified a file that is read-only. -or- specified a file that is hidden. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while creating the file. is in an invalid format. A with the specified buffer size that provides read/write access to the file specified in .

Creates or overwrites a file in the specified path, specifying a buffer size and options that describe how to create or overwrite the file.

The path and name of the file to create. The number of bytes buffered for reads and writes to the file. One of the values that describes how to create or overwrite the file. The caller does not have the required permission. -or- specified a file that is read-only. -or- specified a file that is hidden. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive. An I/O error occurred while creating the file. is in an invalid format. A new file with the specified buffer size.

Creates or opens a file for writing UTF-8 encoded text. If the file already exists, its contents are overwritten.

The file to be opened for writing. The caller does not have the required permission. -or- specified a file that is read-only. -or- specified a file that is hidden. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). is in an invalid format. A that writes to the specified file using UTF-8 encoding.

Decrypts a file that was encrypted by the current account using the method.

A path that describes a file to decrypt. The parameter is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . The parameter is . An invalid drive was specified. The file described by the parameter could not be found. An I/O error occurred while opening the file. For example, the encrypted file is already open. -or- This operation is not supported on the current platform. The specified path, file name, or both exceed the system-defined maximum length. The current operating system is not Windows NT or later. The file system is not NTFS. The parameter specified a file that is read-only. -or- This operation is not supported on the current platform. -or- The parameter specified a directory. -or- The caller does not have the required permission.

Deletes the specified file.

The name of the file to be deleted. Wildcard characters are not supported. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path is invalid (for example, it is on an unmapped drive). The specified file is in use. -or- There is an open handle on the file, and the operating system is Windows XP or earlier. This open handle can result from enumerating directories and files. For more information, see How to: Enumerate Directories and Files. is in an invalid format. The specified path, file name, or both exceed the system-defined maximum length. The caller does not have the required permission. -or- The file is an executable file that is in use. -or- is a directory. -or- specified a read-only file.

Encrypts a file so that only the account used to encrypt the file can decrypt it.

A path that describes a file to encrypt. The parameter is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . The parameter is . An invalid drive was specified. The file described by the parameter could not be found. An I/O error occurred while opening the file. -or- This operation is not supported on the current platform. The specified path, file name, or both exceed the system-defined maximum length. The current operating system is not Windows NT or later. The file system is not NTFS. The parameter specified a file that is read-only. -or- This operation is not supported on the current platform. -or- The parameter specified a directory. -or- The caller does not have the required permission.

Determines whether the specified file exists.

The file to check. if the caller has the required permissions and contains the name of an existing file; otherwise, . This method also returns if is , an invalid path, or a zero-length string. If the caller does not have sufficient permissions to read the specified file, no exception is thrown and the method returns regardless of the existence of .

Gets the of the file on the path.

The path to the file. is empty, contains only white spaces, or contains invalid characters. The specified path, file name, or both exceed the system-defined maximum length. is in an invalid format. represents a file and is invalid, such as being on an unmapped drive, or the file cannot be found. represents a directory and is invalid, such as being on an unmapped drive, or the directory cannot be found. This file is being used by another process. The caller does not have the required permission. The of the file on the path.

Returns the creation date and time of the specified file or directory.

The file or directory for which to obtain creation date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. is in an invalid format. A structure set to the creation date and time for the specified file or directory. This value is expressed in local time.

Returns the creation date and time, in coordinated universal time (UTC), of the specified file or directory.

The file or directory for which to obtain creation date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. is in an invalid format. A structure set to the creation date and time for the specified file or directory. This value is expressed in UTC time.

Returns the date and time the specified file or directory was last accessed.

The file or directory for which to obtain access date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. is in an invalid format. A structure set to the date and time that the specified file or directory was last accessed. This value is expressed in local time.

Returns the date and time, in coordinated universal time (UTC), that the specified file or directory was last accessed.

The file or directory for which to obtain access date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. is in an invalid format. A structure set to the date and time that the specified file or directory was last accessed. This value is expressed in UTC time.

Returns the date and time the specified file or directory was last written to.

The file or directory for which to obtain write date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. is in an invalid format. A structure set to the date and time that the specified file or directory was last written to. This value is expressed in local time.

Returns the date and time, in coordinated universal time (UTC), that the specified file or directory was last written to.

The file or directory for which to obtain write date and time information. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. is in an invalid format. A structure set to the date and time that the specified file or directory was last written to. This value is expressed in UTC time.

Moves a specified file to a new location, providing the option to specify a new file name.

The name of the file to move. Can include a relative or absolute path. The new path and name for the file. already exists. was not found. or is . or is a zero-length string, contains only white space, or contains invalid characters as defined in . The caller does not have the required permission. The specified path, file name, or both exceed the system-defined maximum length. The path specified in or is invalid, (for example, it is on an unmapped drive). or is in an invalid format.

Moves a specified file to a new location, providing the options to specify a new file name and to overwrite the destination file if it already exists.

The name of the file to move. Can include a relative or absolute path. The new path and name for the file. to overwrite the destination file if it already exists; otherwise. already exists and is . was not found. or is . or is a zero-length string, contains only white space, or contains invalid characters as defined in . The caller does not have the required permission. The specified path, file name, or both exceed the system-defined maximum length. The path specified in or is invalid, (for example, it is on an unmapped drive). or is in an invalid format.

Opens a on the specified path with read/write access with no sharing.

The file to open. A value that specifies whether a file is created if one does not exist, and determines whether the contents of existing files are retained or overwritten. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid, (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. -or- is and the specified file is a hidden file. specified an invalid value. The file specified in was not found. is in an invalid format. A opened in the specified mode and path, with read/write access and not shared.

Opens a on the specified path, with the specified mode and access with no sharing.

The file to open. A value that specifies whether a file is created if one does not exist, and determines whether the contents of existing files are retained or overwritten. A value that specifies the operations that can be performed on the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . -or- specified and specified , , , or . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid, (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only and is not . -or- specified a directory. -or- The caller does not have the required permission. -or- is and the specified file is a hidden file. or specified an invalid value. The file specified in was not found. is in an invalid format. An unshared that provides access to the specified file, with the specified mode and access.

Opens a on the specified path, having the specified mode with read, write, or read/write access and the specified sharing option.

The file to open. A value that specifies whether a file is created if one does not exist, and determines whether the contents of existing files are retained or overwritten. A value that specifies the operations that can be performed on the file. A value specifying the type of access other threads have to the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . -or- specified and specified , , , or . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid, (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only and is not . -or- specified a directory. -or- The caller does not have the required permission. -or- is and the specified file is a hidden file. , , or specified an invalid value. The file specified in was not found. is in an invalid format. A on the specified path, having the specified mode with read, write, or read/write access and the specified sharing option.

Opens an existing file for reading.

The file to be opened for reading. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid, (for example, it is on an unmapped drive). specified a directory. -or- The caller does not have the required permission. The file specified in was not found. is in an invalid format. An I/O error occurred while opening the file. A read-only on the specified path.

Opens an existing UTF-8 encoded text file for reading.

The file to be opened for reading. The caller does not have the required permission. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid, (for example, it is on an unmapped drive). The file specified in was not found. is in an invalid format. A on the specified path.

Opens an existing file or creates a new file for writing.

The file to be opened for writing. The caller does not have the required permission. -or- specified a read-only file or directory. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid, (for example, it is on an unmapped drive). is in an invalid format. An unshared object on the specified path with access.

Opens a binary file, reads the contents of the file into a byte array, and then closes the file.

The file to open for reading. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. The file specified in was not found. is in an invalid format. The caller does not have the required permission. A byte array containing the contents of the file.

Asynchronously opens a binary file, reads the contents of the file into a byte array, and then closes the file.

The file to open for reading. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous read operation, which wraps the byte array containing the contents of the file.

Opens a text file, reads all lines of the file, and then closes the file.

The file to open for reading. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. The file specified in was not found. is in an invalid format. The caller does not have the required permission. A string array containing all lines of the file.

Opens a file, reads all lines of the file with the specified encoding, and then closes the file.

The file to open for reading. The encoding applied to the contents of the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. The file specified in was not found. is in an invalid format. The caller does not have the required permission. A string array containing all lines of the file.

Asynchronously opens a text file, reads all lines of the file with the specified encoding, and then closes the file.

The file to open for reading. The encoding applied to the contents of the file. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous read operation, which wraps the string array containing all lines of the file.

Asynchronously opens a text file, reads all lines of the file, and then closes the file.

The file to open for reading. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous read operation, which wraps the string array containing all lines of the file.

Opens a text file, reads all the text in the file, and then closes the file.

The file to open for reading. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. The file specified in was not found. is in an invalid format. The caller does not have the required permission. A string containing all the text in the file.

Opens a file, reads all text in the file with the specified encoding, and then closes the file.

The file to open for reading. The encoding applied to the contents of the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. The file specified in was not found. is in an invalid format. The caller does not have the required permission. A string containing all text in the file.

Asynchronously opens a text file, reads all text in the file with the specified encoding, and then closes the file.

The file to open for reading. The encoding applied to the contents of the file. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous read operation, which wraps the string containing all text in the file.

Asynchronously opens a text file, reads all the text in the file, and then closes the file.

The file to open for reading. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous read operation, which wraps the string containing all text in the file.

Reads the lines of a file.

The file to read. is a zero-length string, contains only white space, or contains one or more invalid characters defined by the method. is . is invalid (for example, it is on an unmapped drive). The file specified by was not found. An I/O error occurred while opening the file. exceeds the system-defined maximum length. The caller does not have the required permission. specifies a file that is read-only. -or- This operation is not supported on the current platform. -or- is a directory. -or- The caller does not have the required permission. All the lines of the file, or the lines that are the result of a query.

Read the lines of a file that has a specified encoding.

The file to read. The encoding that is applied to the contents of the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by the method. is . is invalid (for example, it is on an unmapped drive). The file specified by was not found. An I/O error occurred while opening the file. exceeds the system-defined maximum length. The caller does not have the required permission. specifies a file that is read-only. -or- This operation is not supported on the current platform. -or- is a directory. -or- The caller does not have the required permission. All the lines of the file, or the lines that are the result of a query.

Replaces the contents of a specified file with the contents of another file, deleting the original file, and creating a backup of the replaced file.

The name of a file that replaces the file specified by . The name of the file being replaced. The name of the backup file. The path described by the parameter was not of a legal form. -or- The path described by the parameter was not of a legal form. The parameter is . An invalid drive was specified. The file described by the current object could not be found. -or- The file described by the parameter could not be found. An I/O error occurred while opening the file. -or- The and parameters specify the same file. The specified path, file name, or both exceed the system-defined maximum length. The operating system is Windows 98 Second Edition or earlier and the files system is not NTFS. The or parameter specifies a file that is read-only. -or- This operation is not supported on the current platform. -or- Source or destination parameters specify a directory instead of a file. -or- The caller does not have the required permission.

Replaces the contents of a specified file with the contents of another file, deleting the original file, and creating a backup of the replaced file and optionally ignores merge errors.

The name of a file that replaces the file specified by . The name of the file being replaced. The name of the backup file. to ignore merge errors (such as attributes and access control lists (ACLs)) from the replaced file to the replacement file; otherwise, . The path described by the parameter was not of a legal form. -or- The path described by the parameter was not of a legal form. The parameter is . An invalid drive was specified. The file described by the current object could not be found. -or- The file described by the parameter could not be found. An I/O error occurred while opening the file. -or- The and parameters specify the same file. The specified path, file name, or both exceed the system-defined maximum length. The operating system is Windows 98 Second Edition or earlier and the files system is not NTFS. The or parameter specifies a file that is read-only. -or- This operation is not supported on the current platform. -or- Source or destination parameters specify a directory instead of a file. -or- The caller does not have the required permission.

Sets the specified of the file on the specified path.

The path to the file. A bitwise combination of the enumeration values. is empty, contains only white spaces, contains invalid characters, or the file attribute is invalid. The specified path, file name, or both exceed the system-defined maximum length. is in an invalid format. The specified path is invalid, (for example, it is on an unmapped drive). The file cannot be found. specified a file that is read-only. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission.

Sets the date and time the file was created.

The file for which to set the creation date and time information. A containing the value to set for the creation date and time of . This value is expressed in local time. The specified path was not found. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. An I/O error occurred while performing the operation. specifies a value outside the range of dates, times, or both permitted for this operation. The caller does not have the required permission. is in an invalid format.

Sets the date and time, in coordinated universal time (UTC), that the file was created.

The file for which to set the creation date and time information. A containing the value to set for the creation date and time of . This value is expressed in UTC time. The specified path was not found. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. An I/O error occurred while performing the operation. specifies a value outside the range of dates, times, or both permitted for this operation. The caller does not have the required permission. is in an invalid format.

Sets the date and time the specified file was last accessed.

The file for which to set the access date and time information. A containing the value to set for the last access date and time of . This value is expressed in local time. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path was not found. The caller does not have the required permission. is in an invalid format. specifies a value outside the range of dates or times permitted for this operation.

Sets the date and time, in coordinated universal time (UTC), that the specified file was last accessed.

The file for which to set the access date and time information. A containing the value to set for the last access date and time of . This value is expressed in UTC time. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path was not found. The caller does not have the required permission. is in an invalid format. specifies a value outside the range of dates or times permitted for this operation.

Sets the date and time that the specified file was last written to.

The file for which to set the date and time information. A containing the value to set for the last write date and time of . This value is expressed in local time. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path was not found. The caller does not have the required permission. is in an invalid format. specifies a value outside the range of dates or times permitted for this operation.

Sets the date and time, in coordinated universal time (UTC), that the specified file was last written to.

The file for which to set the date and time information. A containing the value to set for the last write date and time of . This value is expressed in UTC time. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path was not found. The caller does not have the required permission. is in an invalid format. specifies a value outside the range of dates or times permitted for this operation.

Creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.

The file to write to. The bytes to write to the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is or the byte array is empty. The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- specified a file that is hidden. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. is in an invalid format. The caller does not have the required permission.

Asynchronously creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.

The file to write to. The bytes to write to the file. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous write operation.

Creates a new file, writes a collection of strings to the file, and then closes the file.

The file to write to. The lines to write to the file. is a zero-length string, contains only white space, or contains one or more invalid characters defined by the method. Either or is . is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. exceeds the system-defined maximum length. is in an invalid format. The caller does not have the required permission. specified a file that is read-only. -or- specified a file that is hidden. -or- This operation is not supported on the current platform. -or- is a directory. -or- The caller does not have the required permission.

Creates a new file by using the specified encoding, writes a collection of strings to the file, and then closes the file.

The file to write to. The lines to write to the file. The character encoding to use. is a zero-length string, contains only white space, or contains one or more invalid characters defined by the method. Either , , or is . is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. exceeds the system-defined maximum length. is in an invalid format. The caller does not have the required permission. specified a file that is read-only. -or- specified a file that is hidden. -or- This operation is not supported on the current platform. -or- is a directory. -or- The caller does not have the required permission.

Creates a new file, write the specified string array to the file, and then closes the file.

The file to write to. The string array to write to the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . Either or is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- specified a file that is hidden. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. is in an invalid format. The caller does not have the required permission.

Creates a new file, writes the specified string array to the file by using the specified encoding, and then closes the file.

The file to write to. The string array to write to the file. An object that represents the character encoding applied to the string array. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . Either or is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- specified a file that is hidden. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. is in an invalid format. The caller does not have the required permission.

Asynchronously creates a new file, write the specified lines to the file by using the specified encoding, and then closes the file.

The file to write to. The lines to write to the file. The character encoding to use. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous write operation.

Asynchronously creates a new file, writes the specified lines to the file, and then closes the file.

The file to write to. The lines to write to the file. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous write operation.

Creates a new file, writes the specified string to the file, and then closes the file. If the target file already exists, it is overwritten.

The file to write to. The string to write to the file. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- specified a file that is hidden. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. is in an invalid format. The caller does not have the required permission.

Creates a new file, writes the specified string to the file using the specified encoding, and then closes the file. If the target file already exists, it is overwritten.

The file to write to. The string to write to the file. The encoding to apply to the string. is a zero-length string, contains only white space, or contains one or more invalid characters as defined by . is . The specified path, file name, or both exceed the system-defined maximum length. The specified path is invalid (for example, it is on an unmapped drive). An I/O error occurred while opening the file. specified a file that is read-only. -or- specified a file that is hidden. -or- This operation is not supported on the current platform. -or- specified a directory. -or- The caller does not have the required permission. is in an invalid format. The caller does not have the required permission.

Asynchronously creates a new file, writes the specified string to the file using the specified encoding, and then closes the file. If the target file already exists, it is overwritten.

The file to write to. The string to write to the file. The encoding to apply to the string. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous write operation.

Asynchronously creates a new file, writes the specified string to the file, and then closes the file. If the target file already exists, it is overwritten.

The file to write to. The string to write to the file. The token to monitor for cancellation requests. The default value is . A task that represents the asynchronous write operation.

Provides properties and instance methods for the creation, copying, deletion, moving, and opening of files, and aids in the creation of objects. This class cannot be inherited.

Initializes a new instance of the class, which acts as a wrapper for a file path.

The fully qualified name of the new file, or the relative file name. Do not end the path with the directory separator character. is . The caller does not have the required permission. The file name is empty, contains only white spaces, or contains invalid characters. Access to is denied. The specified path, file name, or both exceed the system-defined maximum length. contains a colon (:) in the middle of the string.

Creates a that appends text to the file represented by this instance of the .

A new .

Copies an existing file to a new file, disallowing the overwriting of an existing file.

The name of the new file to copy to. is empty, contains only white spaces, or contains invalid characters. An error occurs, or the destination file already exists. The caller does not have the required permission. is . A directory path is passed in, or the file is being moved to a different drive. The directory specified in does not exist. The specified path, file name, or both exceed the system-defined maximum length. contains a colon (:) within the string but does not specify the volume. A new file with a fully qualified path.

Copies an existing file to a new file, allowing the overwriting of an existing file.

The name of the new file to copy to. to allow an existing file to be overwritten; otherwise, . is empty, contains only white spaces, or contains invalid characters. An error occurs, or the destination file already exists and is . The caller does not have the required permission. is . The directory specified in does not exist. A directory path is passed in, or the file is being moved to a different drive. The specified path, file name, or both exceed the system-defined maximum length. contains a colon (:) in the middle of the string. A new file, or an overwrite of an existing file if is . If the file exists and is , an is thrown.

Creates a file.

A new file.

Creates a that writes a new text file.

The file name is a directory. The disk is read-only. The caller does not have the required permission. A new .

Decrypts a file that was encrypted by the current account using the method.

An invalid drive was specified. The file described by the current object could not be found. An I/O error occurred while opening the file. The file system is not NTFS. The current operating system is not Microsoft Windows NT or later. The file described by the current object is read-only. -or- This operation is not supported on the current platform. -or- The caller does not have the required permission.

Permanently deletes a file.

The target file is open or memory-mapped on a computer running Microsoft Windows NT. -or- There is an open handle on the file, and the operating system is Windows XP or earlier. This open handle can result from enumerating directories and files. For more information, see How to: Enumerate Directories and Files. The caller does not have the required permission. The path is a directory.

Encrypts a file so that only the account used to encrypt the file can decrypt it.

An invalid drive was specified. The file described by the current object could not be found. An I/O error occurred while opening the file. The file system is not NTFS. The current operating system is not Microsoft Windows NT or later. The file described by the current object is read-only. -or- This operation is not supported on the current platform. -or- The caller does not have the required permission.

Moves a specified file to a new location, providing the option to specify a new file name.

The path to move the file to, which can specify a different file name. An I/O error occurs, such as the destination file already exists or the destination device is not ready. is . is empty, contains only white spaces, or contains invalid characters. The caller does not have the required permission. is read-only or is a directory. The file is not found. The specified path is invalid, such as being on an unmapped drive. The specified path, file name, or both exceed the system-defined maximum length. contains a colon (:) in the middle of the string.

Moves a specified file to a new location, providing the options to specify a new file name and to overwrite the destination file if it already exists.

The path to move the file to, which can specify a different file name. to overwrite the destination file if it already exists; otherwise. An I/O error occurred, such as the destination device is not ready. is . is empty, contains only white spaces, or contains invalid characters. The caller does not have the required permission. is read-only or is a directory. The file is not found. The specified path is invalid, such as being on an unmapped drive. The specified path, file name, or both exceed the system-defined maximum length. contains a colon (:) in the middle of the string.

Opens a file in the specified mode.

A constant specifying the mode (for example, or ) in which to open the file. The file is not found. The file is read-only or is a directory. The specified path is invalid, such as being on an unmapped drive. The file is already open. A file opened in the specified mode, with read/write access and unshared.

Opens a file in the specified mode with read, write, or read/write access.

A constant specifying the mode (for example, or ) in which to open the file. A constant specifying whether to open the file with , , or file access. The caller does not have the required permission. The file is not found. is read-only or is a directory. The specified path is invalid, such as being on an unmapped drive. The file is already open. is empty or contains only white spaces. One or more arguments is null. A object opened in the specified mode and access, and unshared.

Opens a file in the specified mode with read, write, or read/write access and the specified sharing option.

A constant specifying the mode (for example, or ) in which to open the file. A constant specifying whether to open the file with , , or file access. A constant specifying the type of access other objects have to this file. The caller does not have the required permission. The file is not found. is read-only or is a directory. The specified path is invalid, such as being on an unmapped drive. The file is already open. is empty or contains only white spaces. One or more arguments is null. A object opened with the specified mode, access, and sharing options.

Creates a read-only .

is read-only or is a directory. The specified path is invalid, such as being on an unmapped drive. The file is already open. A new read-only object.

Creates a with UTF8 encoding that reads from an existing text file.

The caller does not have the required permission. The file is not found. is read-only or is a directory. The specified path is invalid, such as being on an unmapped drive. A new with UTF8 encoding.

Creates a write-only .

The path specified when creating an instance of the object is read-only or is a directory. The path specified when creating an instance of the object is invalid, such as being on an unmapped drive. A write-only unshared object for a new or existing file.

Replaces the contents of a specified file with the file described by the current object, deleting the original file, and creating a backup of the replaced file.

The name of a file to replace with the current file. The name of a file with which to create a backup of the file described by the parameter. The path described by the parameter was not of a legal form. -or- The path described by the parameter was not of a legal form. The parameter is . The file described by the current object could not be found. -or- The file described by the parameter could not be found. The current operating system is not Microsoft Windows NT or later. A object that encapsulates information about the file described by the parameter.

Replaces the contents of a specified file with the file described by the current object, deleting the original file, and creating a backup of the replaced file. Also specifies whether to ignore merge errors.

The name of a file to replace with the current file. The name of a file with which to create a backup of the file described by the parameter. to ignore merge errors (such as attributes and ACLs) from the replaced file to the replacement file; otherwise . The path described by the parameter was not of a legal form. -or- The path described by the parameter was not of a legal form. The parameter is . The file described by the current object could not be found. -or- The file described by the parameter could not be found. The current operating system is not Microsoft Windows NT or later. A object that encapsulates information about the file described by the parameter.

Returns the path as a string. Use the property for the full path.

A string representing the path.

Gets an instance of the parent directory.

The specified path is invalid, such as being on an unmapped drive. The caller does not have the required permission. A object representing the parent directory of this file.

Gets a string representing the directory's full path.

was passed in for the directory name. The fully qualified path name exceeds the system-defined maximum length. The caller does not have the required permission. A string representing the directory's full path.

Gets a value indicating whether a file exists.

if the file exists; if the file does not exist or if the file is a directory.

Gets or sets a value that determines if the current file is read only.

The file described by the current object could not be found. An I/O error occurred while opening the file. This operation is not supported on the current platform. -or- The caller does not have the required permission. The user does not have write permission, but attempted to set this property to . if the current file is read only; otherwise, .

Gets the size, in bytes, of the current file.

cannot update the state of the file or directory. The file does not exist. -or- The property is called for a directory. The size of the current file in bytes.

Gets the name of the file.

The name of the file.

Provides the base class for both and objects.

Represents the fully qualified path of the directory or file.

The fully qualified path exceeds the system-defined maximum length.

The path originally specified by the user, whether relative or absolute.

Initializes a new instance of the class.

Initializes a new instance of the class with serialized data.

The that holds the serialized object data about the exception being thrown. The that contains contextual information about the source or destination. The specified is null.

Deletes a file or directory.

The specified path is invalid; for example, it is on an unmapped drive. There is an open handle on the file or directory, and the operating system is Windows XP or earlier. This open handle can result from enumerating directories and files. For more information, see How to: Enumerate Directories and Files.

Sets the object with the file name and additional exception information.

The that holds the serialized object data about the exception being thrown. The that contains contextual information about the source or destination.

Refreshes the state of the object.

A device such as a disk drive is not ready.

Returns the original path. Use the or properties for the full path or file/directory name.

A string with the original path.

Gets or sets the attributes for the current file or directory.

The specified file doesn't exist. Only thrown when setting the property value. The specified path is invalid. For example, it's on an unmapped drive. Only thrown when setting the property value. The caller doesn't have the required permission. .NET Core only: The user attempts to set an attribute value but doesn't have write permission. The specified path, file name, or both exceed the system-defined maximum length. The caller attempts to set an invalid file attribute. -or- .NET Framework only: The user attempts to set an attribute value but doesn't have write permission. cannot initialize the data. of the current .

Gets or sets the creation time of the current file or directory.

cannot initialize the data. The specified path is invalid; for example, it is on an unmapped drive. The current operating system is not Windows NT or later. The caller attempts to set an invalid creation time. The creation date and time of the current object.

Gets or sets the creation time, in coordinated universal time (UTC), of the current file or directory.

cannot initialize the data. The specified path is invalid; for example, it is on an unmapped drive. The current operating system is not Windows NT or later. The caller attempts to set an invalid access time. The creation date and time in UTC format of the current object.

Gets a value indicating whether the file or directory exists.

if the file or directory exists; otherwise, .

Gets the string representing the extension part of the file.

A string containing the extension.

Gets the full path of the directory or file.

The fully qualified path and file name exceed the system-defined maximum length. The caller does not have the required permission. A string containing the full path.

Gets or sets the time the current file or directory was last accessed.

cannot initialize the data. The current operating system is not Windows NT or later. The caller attempts to set an invalid access time The time that the current file or directory was last accessed.

Gets or sets the time, in coordinated universal time (UTC), that the current file or directory was last accessed.

cannot initialize the data. The current operating system is not Windows NT or later. The caller attempts to set an invalid access time. The UTC time that the current file or directory was last accessed.

Gets or sets the time when the current file or directory was last written to.

cannot initialize the data. The current operating system is not Windows NT or later. The caller attempts to set an invalid write time. The time the current file was last written.

Gets or sets the time, in coordinated universal time (UTC), when the current file or directory was last written to.

cannot initialize the data. The current operating system is not Windows NT or later. The caller attempts to set an invalid write time. The UTC time when the current file was last written to.

For files, gets the name of the file. For directories, gets the name of the last directory in the hierarchy if a hierarchy exists. Otherwise, the property gets the name of the directory.

A string that is the name of the parent directory, the name of the last directory in the hierarchy, or the name of a file, including the file name extension.

Specifies the type of character casing to match.

Matches ignoring character casing.

Matches respecting character casing.

Matches using the default casing for the given platform.

Specifies the type of wildcard matching to use.

Matches using '*' and '?' wildcards.

Match using Win32 DOS style matching semantics. '*', '?', '<', '>', and '"' are all considered wildcards.

Specifies whether to search the current directory, or the current directory and all subdirectories.

Includes the current directory and all its subdirectories in a search operation. This option includes reparse points such as mounted drives and symbolic links in the search.

Includes only the current directory in a search operation.