ServiceManager.RemoveCallback Method

Removes a callback method from a delegate.

Namespace:  Microsoft.Windows.Design
Assembly:  Microsoft.Windows.Design.Extensibility (in Microsoft.Windows.Design.Extensibility.dll)

Syntax

'Declaration
Protected Shared Function RemoveCallback ( _
    existing As Delegate, _
    toRemove As Delegate _
) As Delegate

protected static Delegate RemoveCallback(
    Delegate existing,
    Delegate toRemove
)

protected:
static Delegate^ RemoveCallback(
    Delegate^ existing, 
    Delegate^ toRemove
)

static member RemoveCallback : 
        existing:Delegate * 
        toRemove:Delegate -> Delegate 

protected static function RemoveCallback(
    existing : Delegate, 
    toRemove : Delegate
) : Delegate

Parameters

• existing
  Type: System.Delegate
  The delegate to remove the callback from.

• toRemove
  Type: System.Delegate
  The callback method to remove from the delegate.

Return Value

Type: System.Delegate
A new delegate to replace the existing delegate. If existing is nulla null reference (Nothing in Visual Basic), returns nulla null reference (Nothing in Visual Basic). If toRemove is nulla null reference (Nothing in Visual Basic), returns existing.

Remarks

This method knows how to unwrap delegates that are proxies to generic callbacks. If the delegate was created to proxy a generic delegate, this method removes the original object, not the proxy.

You can use this method in your implementation of Unsubscribe.

.NET Framework Security

• 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.

See Also

Reference

ServiceManager Class

Microsoft.Windows.Design Namespace

EditingContext

ContextItem

Other Resources

WPF Designer Extensibility