File.GetLastWriteTime Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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

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


Public Shared Function GetLastWriteTime ( _
    path As String _
) As DateTime
public static DateTime GetLastWriteTime(
    string path


  • path
    Type: System..::.String
    The file or directory for which to obtain write date and time information.

Return Value

Type: System..::.DateTime
A DateTime structure set to the date and time that the specified file or directory was last written to. This value is expressed in local time.


Exception Condition

The caller does not have the required permission.


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


path is nullNothingnullptra null reference (Nothing in Visual Basic).


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.


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.

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0


Windows Phone

See Also


File Class

System.IO Namespace