Parameters

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.

path

The file to open.

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.

Returns

A System.IO.FileStream opened in the specified mode and path, with read/write access and not shared.

Exceptions

Type	Reason
System.Security.SecurityException	The caller does not have the required permission.
ArgumentException	path is a zero-length string, contains only white space, or contains one or more implementation-specific invalid characters.
System.IO.FileNotFoundException	path was not found.
ArgumentNullException	path is null.
ArgumentOutOfRangeException	mode specified an invalid value.
System.IO.DirectoryNotFoundException	The directory information specified in path was not found.
System.IO.IOException	An I/O error occurred while opening the file.
UnauthorizedAccessException	The caller does not have the required permission.
System.IO.PathTooLongException	The length of path or the absolute path information for path exceeds the system-defined maximum length.

Remarks

The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory. To obtain the current working directory, see Directory.GetCurrentDirectory.

For a list of common I/O tasks, see Common I/O Tasks.

Permissions

Requirements