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POEmulate IDispatchEx in C#
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copied!<p>C# 3.0 Extension methods add extensions to the base Type making calling that method on all <em>instances</em> of that Type legal.</p> <p>Now, JavaScript I know implements IDispatchEx through which it's possible to add methods to a specific instance.</p> <p>So how do I add a set of methods to an 'instance' of a C# class? I know this is a Dynamic vs. Static Languages holy war territory. :) Let me clarify my intention is NOT that.</p> <p>I just want to be able to add a set of events to an interface depending on the class implementing that interface.</p> <p>I was able to do that using Generics </p> <pre><code>inteface ISample<T> { T SupportedEvents; } class Sample : ISample<UIWidgetEvent> { } class Sample2 : ISample<NonVisualUIWidget> { } class UIWidgetEvent { public EventHandler Clicked; } class NonVisualUIWidget {public EventHandler Expired;} class TestSample { public void Test() { new Sample().SupportedEvents.Clicked += ... new Sample2().SupportedEvents.Expired += ... } } </code></pre> <p>Then I didn't like <code>SupportedEvents</code> I want to be able to say </p> <pre><code>new Sample().Clicked +=... </code></pre> <p>Then I thought JavaScript (I know <code>C#</code> is not <code>JS</code> :))... AND <code>IDispatchEx</code>, <code>IL Weaving</code>, <code>Reflection.Emit</code> etc. etc. and thought may be there's a way to do this... [Design time support would be nice but I can live without]</p> <p>Yes, I probably could do this "instance augmentation" with a Visitor pattern. [Not sure if I could get the syntatic sugar though]</p> <p>Comments?</p>

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