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File.OpenWrite Method

July 28, 2014

Opens an existing file for writing.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)

public static FileStream OpenWrite(
	string path
)

Parameters

path
Type: System.String
The file to be opened for writing.

Return Value

Type: System.IO.FileStream
An unshared FileStream object on the specified path with Write access.

ExceptionCondition
UnauthorizedAccessException

The caller does not have the required permission.

-or-

path specified a read-only file or directory.

ArgumentException

path is a zero-length string, contains only white space, or contains one or more invalid characters as defined by GetInvalidPathChars.

ArgumentNullException

path is null.

PathTooLongException

The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters.

DirectoryNotFoundException

The specified path is invalid, (for example, it is on an unmapped drive).

FileNotFoundException

The file specified in path was not found.

NotSupportedException

path is in an invalid format.

Version Notes

Windows Phone

 This member has a SecurityCriticalAttribute attribute. This attribute restricts this member to internal use. Application code that uses this member throws a MethodAccessException.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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