FileSystemInfo.LastWriteTimeUtc Property


Gets or sets the time, in coordinated universal time (UTC), when the current file or directory was last written to.

 property DateTime LastWriteTimeUtc { DateTime get(); void set(DateTime value); };
public DateTime LastWriteTimeUtc { get; set; }
public DateTime LastWriteTimeUtc { get; set; }
member this.LastWriteTimeUtc : DateTime with get, set
Public Property LastWriteTimeUtc As DateTime

Property Value


The UTC time when the current file was last written to.



Refresh() cannot initialize the data.

The current operating system is not Windows NT or later.

The caller attempts to set an invalid write time.



This method may return an inaccurate value because it uses native functions whose values may not be continuously updated by the operating system.

The value of the LastWriteTimeUtc property is pre-cached if the current instance of the FileSystemInfo object was returned from any of the following DirectoryInfo methods:

To get the latest value, call the Refresh method.

If the file or directory described in the FileSystemInfo object does not exist, or if the file system that contains this file or directory does not support this information, this property returns 12:00 midnight, January 1, 1601 A.D. (C.E.) Coordinated Universal Time (UTC).

Applies to

See also