Assembly: System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)
'Declaration Public Sub RemoveHandler ( _ dependencyEvent As DependencyProperty, _ value As Object _ )
Either of the arguments is a null reference (Nothing in Visual Basic).
The dependencyEvent is a metaproperty.
The dependencyEvent is not an event.
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.
#Region "Public Events" <DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)> _ <Description("The SendingEmail event is raised before an email is sent through SMTP.")> _ <Category(EventsCategory)> _ <Browsable(True)> _ Public Custom Event SendingEmail As EventHandler AddHandler(ByVal value As EventHandler) MyBase.AddHandler(SendEmailActivity.SendingEmailEvent, value) End AddHandler RemoveHandler(ByVal value As EventHandler) MyBase.RemoveHandler(SendEmailActivity.SendingEmailEvent, value) End RemoveHandler RaiseEvent(ByVal sender As Object, ByVal e As System.EventArgs) End RaiseEvent End Event
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.