FileSystemInfo.LastWriteTimeUtc Property
Updated: May 2010
Gets or sets the time, in coordinated universal time (UTC), when the current file or directory was last written to.
Assembly: mscorlib (in mscorlib.dll)
| Exception | Condition |
|---|---|
| IOException |
Refresh cannot initialize the data. |
| PlatformNotSupportedException |
The current operating system is not Windows NT or later. |
| ArgumentOutOfRangeException |
The caller attempts to set an invalid write time. |
Note 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 described in the FileSystemInfo object does not exist, this property will return 12:00 midnight, January 1, 1601 A.D. (C.E.) Coordinated Universal Time (UTC).
This property value is null if the file system containing the file does not support this information.
Windows 95, Windows 98, Windows 98 Second Edition Platform Note: These operating systems do not support this property, and DirectoryInfo implementations of this property are not supported.
-
FileIOPermission
for setting the last write time. Associated enumeration: FileIOPermissionAccess.Write
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
