Windows apps
Collapse the table of content
Expand the table of content
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

File.Move Method

When it is called by trusted applications, moves a specified file to a new location, providing the option to specify a new file name.

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

public static void Move(
	string sourceFileName,
	string destFileName


Type: System.String
The name of the file to move.
Type: System.String
The new path for the file.


The destination file already exists.


sourceFileName or destFileName is null.


sourceFileName or destFileName is a zero-length string, contains only white space, or contains invalid characters as defined in GetInvalidPathChars.


The caller does not have the required permission.


sourceFileName was not found.


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.


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


sourceFileName or destFileName is in an invalid format.

For more information about trusted applications, see Trusted Applications.

Platform Notes

Silverlight for Windows Phone Silverlight for Windows Phone

 This member has a SecurityCriticalAttribute attribute on Silverlight for Windows Phone, because the attribute was present in Silverlight 3. This attribute restricts this member to internal use. Application code that uses this member throws a MethodAccessException.


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Community Additions

© 2017 Microsoft