File.SetLastWriteTimeUtc(String, DateTime) Method


Sets the date and time, in coordinated universal time (UTC), that the specified file was last written to.

 static void SetLastWriteTimeUtc(System::String ^ path, DateTime lastWriteTimeUtc);
public static void SetLastWriteTimeUtc (string path, DateTime lastWriteTimeUtc);
static member SetLastWriteTimeUtc : string * DateTime -> unit
Public Shared Sub SetLastWriteTimeUtc (path As String, lastWriteTimeUtc As DateTime)



The file for which to set the date and time information.


A DateTime containing the value to set for the last write date and time of path. This value is expressed in UTC time.


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

path is null.

The specified path, file name, or both exceed the system-defined maximum length.

The specified path was not found.

The caller does not have the required permission.

path is in an invalid format.

lastWriteTimeUtc specifies a value outside the range of dates or times permitted for this operation.


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 GetCurrentDirectory.

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

Applies to

See also