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Editorial Team
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Asked: 2026-05-25T22:06:33+00:00

Is there any way to cause Visual Studio 2010 to break while debugging when

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Is there any way to cause Visual Studio 2010 to break while debugging when the argument of Debug.Assert evaluates to false?

Example: in my code I have lines like this:

Debug.Assert(!double.IsInfinity(x));

If I am not debugging, a window pops up when the assertion fails.

But when I am debugging, the assertion is logged to the “Output” pane, which is easy to miss; there is not popup window and the debugger does not stop. Therefore: is there any way to force the Visual Studio debugger to break when Debug.Assert fails?

(BTW: I am developing a WPF based desktop application. In a Windows Forms application, the behavior seems to be differnt: here, the debugger stops on Debug.Assert.)

EDIT: Please let me clarify: I am not looking for an alternative to Debug.Assert(), because my code and external code I use is full of Debug.Assert() statements. I am looking for a way to cause the Visual Studio debugger to break when Debugg.Assert fails. (I think earlier VS versions did that, and that the behavior changed in VS2010).

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1 Answer

  1. Editorial Team

    If by debugging you mean using “Step Into” feature, see this MS’s answer to the problem.

    http://connect.microsoft.com/VisualStudio/feedback/details/522995/system-diagnostics-debug-assert-doesnt-pop-up-messagebox-correctly-when-step-into-it-in-vs-2010-and-2008

    Using “Step Over” at the Assert statement does solve the issue too (for me).

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