CODEWITHSUNDEEP
c#
Mike Cheel
Mike Cheel

Reputation: 13106

Invoking method without using the name of the method

I recently saw some code like this (which is calling a delegate):

public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext)
{
    Debug.WriteLine(string.Format("Second watch: Method '{0}' on object '{1}' was invoked  and caught in order {2}.", input.MethodBase.Name, input.Target.GetType(),Order));
    return getNext()(input, getNext);

}

Can someone explain and \ or post a link explaining what is happening here. I understand Invoke() is being called but why is the name optional in this case?

Upvotes: 1

Views: 85

Answers (1)

Wiktor Zychla
Wiktor Zychla

Reputation: 48230

GetNextHandler appears to be a delegate which returns a delegate.

Thus calling it yields a delegate which is then called with two parameters.

 public delegate void FooDelegate( int n );
 public delegate FooDelegate GetFooDelegate();

 public void Bar( GetFooDelegate getFoo ) {

      getFoo()( 5 );

 }

Upvotes: 2

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