Castle.DynamicProxy2 generate proxy of delegate type

Question

Is there a way to create a proxy of a delegate type and have it implement additional interfaces in DynamicProxy2 and also being able to intercept calls to the generated delegate?

The way i normaly generate proxies throws an exception because delegate types are sealed.

Answer 1

delegate types are created at compile time by generating a sealed subclass of MulticastDelegate (see: http://msdn.microsoft.com/en-us/magazine/cc301816.aspx).

AFAIK DynamicProxy2 only works by subclassing types, and so this isn't going to be possible.

There seems to be some technology in Typemock Isolator that can mock sealed classes, but I've not used it and it isn't free, so your mileage my vary.

Answer 2

Patrik,

You don't need DynamicProxy to 'proxy' delegates This should be enough:

Action delegateToproxy = new Foo().Bar; //Bar is public void Bar(){}
Action proxy = delegate
               {
                  Console.WriteLine("Intercepted!");
                  delegateToProxy();
               }
return proxy;

[UPDATE: that aswer was not relevant to this specific problem] What kind of API do you want to expose for this?

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