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FileSystemWatcher.OnChanged Method

Raises the Changed event.

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

protected void OnChanged(
	FileSystemEventArgs e
)

Parameters

e
Type: System.IO.FileSystemEventArgs

A FileSystemEventArgs that contains the event data.

OnChanged is called when changes are made to the size, system attributes, last write time, last access time, or security permissions of a file or directory in the directory being monitored.

Use the NotifyFilter property to restrict the number of events raised when the Changed event is handled.

The OnCreated event is raised as soon as a file is created. If a file is being copied or transferred into a watched directory, the OnCreated event will be raised immediately, followed by one or more OnChanged events.

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

Notes to Inheritors

When overriding OnChanged in a derived class, be sure to call the base class's OnChanged method.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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