C#: How to create an attribute on a method triggering an event when it is invoked?

Question

Is there a way in C# or .NET in general to create an attribute on a method which triggers an event when the method is invoked? Ideally, I would be able to run custom actions

Answer 1

You need some sort of Aspect oriented framework. PostSharp will do it, as will Windsor.

Basically, they subclass your object and override this method...

then it becomes:

//proxy
public override void DoSomeStuff()
{
     if(MethodHasTriggerAttribute)
        Trigger();

     _innerClass.DoSomeStuff();
}

of course all this is hidden to you. All you have to do is ask Windsor for the type, and it will do the proxying for you. The attribute becomes a (custom) facility I think in Windsor.