LastAccessTimeUtc Property

FileSystemInfo.LastAccessTimeUtc Property


Gets or sets the time, in coordinated universal time (UTC), that the current file or directory was last accessed.

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

public DateTime LastAccessTimeUtc { get; set; }

Property Value

Type: System.DateTime

The UTC time that the current file or directory was last accessed.

Exception Condition

Refresh cannot initialize the data.


The current operating system is not Windows NT or later.


The caller attempts to set an invalid access 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 LastAccessTimeUtc 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).

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


These operating systems do not support this property, and DirectoryInfo implementations of this property are not supported.


for setting the last access time. Associated enumeration: FileIOPermissionAccess.Write

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
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