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POMoby Dick of exceptions
 

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    <p>There are multiple questions (<a href="https://stackoverflow.com/q/10866307/2294020">1</a>,<a href="https://stackoverflow.com/q/16548901/2294020">2</a>,<a href="https://stackoverflow.com/q/36014/2294020">3</a>,<a href="https://stackoverflow.com/q/12596242/2294020">4</a> etc. etc.) called "Why isn't this exception caught". Sadly, none of these solutions work for me... So I am stuck with a truly uncatchable exception.</p> <p>I have a piece of code (.NET 4.0) that checks a large textfile for digits and numbers. Whilst testing I got a runtime exception:</p> <p><img src="https://i.stack.imgur.com/0AlfK.png" alt="Exception"></p> <p>What you see here is a try-catch pattern with a catchblock for an ArgumentOutOfRangeException. But during runtime, the try block throws an ArgumentOutOfRangeException that is not being caught.</p> <p>I read the <a href="http://msdn.microsoft.com/en-us/library/ms228593(v=vs.80).aspx" rel="nofollow noreferrer">C# language specification</a> section about the try-catch structure, and it says:</p> <blockquote> <p>A catch block of a try statement is reachable if the try statement is reachable.</p> </blockquote> <p>So in theory the above code should catch the exception.</p> <p>Then I thought it might had something to do with the fact that this code is running in a task (during the processing of the textfile I also want to update the UI so I do it asynchronous). I searched around and then I found <a href="https://stackoverflow.com/a/16548966/2294020">this</a> answer by Jon Skeet. Basically suggesting I use Task.Wait in a try-catch block to catch any exceptions.</p> <p>The problem I am facing now is that I can't really call Task.Wait because that would block the calling thread which is my UI thread! Then I figured that I could create an extra tasklayer to wait for that task:</p> <pre><code>//Code called from the UI System.Threading.Tasks.Task.Factory.StartNew(()=&gt; { //Create a new task and use this task to catch any exceptions System.Threading.Tasks.Task task = System.Threading.Tasks.Task.Factory.StartNew(MethodWithException); try { task.Wait(); } catch(Exception) { MessageBox.Show("Caught it!"); } }); </code></pre> <p>But this still gives the same result... Then I thought that it could be because of the fact I am not specific enough with my Exceptiontype. But the C# Language Specification states:</p> <blockquote> <p>Some programming languages may support exceptions that are not representable as an object derived from System.Exception, although such exceptions could never be generated by C# code. </p> </blockquote> <p>So unless you use some sketchy third party API you're always good when you use <code>Exception</code>. So I found myself with an suggested answer by Jon Skeet that didn't quite work for me. That's when I knew I should just stop trying...</p> <p>So does anyone know what is going on? And how can I fix this? I know I could just check if <code>i</code> is equal or bigger than <code>text.Length</code> but understanding what's happening is more important than working code.</p>
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    1. COIs it also uncaught without an empty `catch` body ?
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    2. COAre you 100% sure that that exception is unhandled? Is it possible that you just set option to break on any exceptions in Visual Studio?
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    3. COHave you tried to run your program outside the VS IDE?
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