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POCreating two delegate instances to the same anonymous method are not equal
 

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  1. POCreating two delegate instances to the same anonymous method are not equal
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    <p>Consider the following example code:</p> <pre><code>static void Main(string[] args) { bool same = CreateDelegate(1) == CreateDelegate(1); } private static Action CreateDelegate(int x) { return delegate { int z = x; }; } </code></pre> <p>You would imagine that the two delegate instances would compare to be equal, just as they would when using the good old named method approach (new Action(MyMethod)). They do not compare to be equal because the .NET Framework provides a hidden closure instance per delegate instance. Since those two delegate instances each have their Target properties set to their individual hidden instance, they do not compare. One possible solution is for the generated IL for an anonymous method to store the current instance (this pointer) in the target of the delegate. This will allow the delegates to compare correctly, and also helps from a debugger standpoint since you will see your class being the target, instead of a hidden class.</p> <p>You can read more about this issue in the bug I submitted to Microsoft. The bug report also gives an example of why we are using this functionality, and why we feel it should be changed. If you feel this to be an issue as well, please help support it by providing rating and validation.</p> <p><a href="https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=489518" rel="noreferrer">https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=489518</a></p> <p>Can you see any possible reason why the functionality should not be changed? Do you feel this was the best course of action to get the issue resolved, or do you recommend that I should take a different route?</p>
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      1. USDale Ragan
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    1. COIn which specification did Microsoft mention that these two should be equal? With same reasoning, I can argue that `new MyClass() == new MyClass()` should be `true` if `MyClass` is an empty class, for instance. You're too quick to name a behavior that's not mentioned in any spec as "bug."
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      1. USMehrdad Afshari
    2. COIn which specification did they mention that they should not be equal?
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