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DependencyObject.RemoveHandler Method

Removes an EventHandler from an associated DependencyProperty.

Namespace:  System.Workflow.ComponentModel
Assembly:  System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)

member RemoveHandler : 
        dependencyEvent:DependencyProperty * 
        value:Object -> unit

Parameters

dependencyEvent
Type: System.Workflow.ComponentModel.DependencyProperty

The DependencyProperty.

value
Type: System.Object

The Object that represents the value of this property. In this case, a Delegate type.

ExceptionCondition
ArgumentNullException

Either of the arguments is a null reference (Nothing in Visual Basic).

ArgumentException

The dependencyEvent is a metaproperty.

ArgumentException

The dependencyEvent is not an event.

ReadOnlyException

The value is a ActivityBind and this instance is not in DesignMode.

Provided as a convenient direct method for removing an event delegate.

When you create a delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. Unless you remove the delegate, the event handler is called whenever the event occurs. For more information about event-handler delegates, see Events and Delegates.

Handlers are added and removed using the following code. For more information, see Send E-mail Activity Sample.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

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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