Parameters

path

A string containing the name of the file to open. [Edit]

mode

A System.IO.FileMode 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. [Edit]

access

A System.IO.FileAccess value that specifies the operations that can be performed on the file. [Edit]

mode

Documentation for this section has not yet been entered. [Edit]

access

Documentation for this section has not yet been entered. [Edit]

Returns

A System.IO.FileStream that provides access to the specified file. [Edit]

Permissions

Type	Reason
System.Security.Permissions.FileIOPermission [Edit]	Requires permission to read and might also require permission to write to the file. See System.Security.Permissions.FileIOPermissionAccess.Read and System.Security.Permissions.FileIOPermissionAccess.Write.

Exceptions

Type	Reason
System.Security.SecurityException	The caller does not have the required permission. [Edit]
ArgumentException	path is a zero-length string, contains only white space, or contains one or more implementation-specific invalid characters. -or- access specified Read and mode specified Create, CreateNew, Truncate or Append. [Edit]
System.IO.FileNotFoundException	mode is FileMode.Truncate or FileMode.Open, but the specified file was not found. If a different mode is specified and the file was not found, a new one is created. [Edit]
ArgumentNullException	path is null. [Edit]
ArgumentOutOfRangeException	mode or access specified an invalid value. [Edit]
System.IO.DirectoryNotFoundException	The directory information specified in path was not found. [Edit]
System.IO.IOException	An I/O error occurred, such as specifying FileMode.CreateNew when the file specified by path already exists. [Edit]
UnauthorizedAccessException	path specified a read-only file and access is not Read, or path specified a directory. [Edit]
System.IO.PathTooLongException	The length of path or the absolute path information for path exceeds the system-defined maximum length. [Edit]

Remarks

This method is equivalent to System.IO.FileStream (path, mode, access, FileShare.None ).

The path argument is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory.

Note: To obtain the current working directory, see Directory.GetCurrentDirectory.

[Edit]

Requirements

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0