LastWriteTimeUtc Property

FileSystemInfo.LastWriteTimeUtc Property

Note: This namespace, class, or member is supported only in version 1.1 of the .NET Framework.

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

[Visual Basic]
Public Property LastWriteTimeUtc As DateTime
public DateTime LastWriteTimeUtc {get; set;}
public: __property DateTime get_LastWriteTimeUtc();
public: __property void set_LastWriteTimeUtc(DateTime);
function get LastWriteTimeUtc() : DateTime;
public function set LastWriteTimeUtc(DateTime);

Property Value

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


Exception Type Condition
IOException Refresh cannot initialize the data.


When first called, FileSystemInfo calls Refresh and returns the cached information on APIs to get attributes and so on. On subsequent calls, you must call Refresh to get the latest copy of the information.

This property value is a null reference (Nothing in Visual Basic) if the file system containing the file does not support this information.

The following table lists examples of other typical or related I/O tasks.

To do this... See the example in this topic...
Write to a text file. Writing Text to a File
Read from a text file. Reading Text from a File
Append text to a file. Opening and Appending to a Log File



Rename or move a file. File.Move


Get the attributes of a file. File.GetAttributes
Set the attributes of a file. File.SetAttributes

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.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

FileSystemInfo Class | FileSystemInfo Members | System.IO Namespace | Working with I/O | Reading Text from a File | Writing Text to a File

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