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Delegate.CombineImpl Method

Concatenates the invocation lists of the specified multicast (combinable) delegate and the current multicast (combinable) delegate.

[Visual Basic]
Protected Overridable Function CombineImpl( _
   ByVal d As Delegate _
) As Delegate
protected virtual Delegate CombineImpl(
 Delegate d
protected: virtual Delegate* CombineImpl(
 Delegate* d
protected function CombineImpl(
   d : Delegate
) : Delegate;


The multicast (combinable) delegate whose invocation list to append to the end of the invocation list of the current multicast (combinable) delegate.

Return Value

A new multicast (combinable) delegate with an invocation list that concatenates the invocation list of the current multicast (combinable) delegate and the invocation list of d.


The current multicast (combinable) delegate, if d is a null reference (Nothing in Visual Basic).


Exception Type Condition
MulticastNotSupportedException Always thrown.


This method applies only if the current delegate is multicast (combinable).

The current implementation simply throws a MulticastNotSupportedException.

The invocation list can contain duplicate entries; that is, entries that refer to the same method on the same object.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

.NET Framework Security: 

See Also

Delegate Class | Delegate Members | System Namespace | Combine