This documentation is archived and is not being maintained.

DispatcherOperationCallback Delegate

Represents a delegate to use for dispatcher operations.

Namespace:  System.Windows.Threading
Assembly:  WindowsBase (in WindowsBase.dll)

public delegate Object DispatcherOperationCallback(
	Object arg
In XAML, you can use delegates but you cannot define your own.


Type: System.Object

An argument passed to the callback.

Return Value

Type: System.Object
The object returned by the callback.

It is not necessary to use this delegate for dispatcher operations, but DispatcherOperationCallback and SendOrPostCallback use dynamic invoking.

Partial Trust applications do not support dynamic invoking, so you must use either DispatcherOperationCallback or SendOrPostCallback if the application is going to be running in Partial Trust.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5, 3.0