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POHow to combine DebuggerHidden with iterator block methods?
 

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  1. POHow to combine DebuggerHidden with iterator block methods?
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    <p><code>DebuggerHidden</code> is pretty handy for marking helper methods, making sure unhandled exceptions stop the debugger in a convenient place:</p> <p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <img src="https://i.stack.imgur.com/6JH5q.png" alt="enter image description here"></p> <p>Unfortunately this doesn't seem to work with iterator blocks:</p> <p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <img src="https://i.stack.imgur.com/HcPM3.png" alt="enter image description here"></p> <p>(if it did, the debugger would show the <code>in</code> as the current statement in the second example).</p> <p>While this is obviously a limitation of Visual Studio (for which I've <a href="https://connect.microsoft.com/VisualStudio/feedback/details/749328/debuggerhidden-has-no-effect-on-methods-that-are-iterator-blocks" rel="nofollow noreferrer">submitted a report</a>), is there some way I could perhaps work around this issue while still using an iterator block?</p> <p>I am guessing that this happens because the compiler-generated code to implement the iterator isn't marked with <code>[DebuggerHidden]</code>. Perhaps there's some way to convince the compiler to do that?</p>
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    1. COI don't really understand your design decision of hiding exceptions this way. I can see two situations that can occur: 1) You're writing a library to be used by other developers. In this case, they don't have your sources and in VS the lowest visible stack level will be ThrowIterator. So it is what you wanted in the first place. 2) This code is used only by your team, internally, for your project. In this case, why would you let an uncaught exception slip like that and not handle it? In case it's thrown, even when debugging, you actually want to see that it's inside ThrowIterator, and most imp
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    2. COSurely it doesn't matter why I'm using this feature. It's there and I just want to see how to get it to work in all circumstances.
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      1. USRoman Starkov
    3. COBut if you're curious, consider a `PerformQuery` method, which throws if the arguments make no sense. It's only used internally by our team. The exception is uncaught because it's a debug build, which *specifically avoids* catching exceptions *just* so that Visual Studio stops at exactly the right place. If the project just closed with a generic "there was a problem" message, wouldn't that only make debugging unnecessarily harder? We *know* there's a bug, might as well stop at exactly the right line!
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