CODEWITHSUNDEEP
c#debugging
codewario
codewario

Reputation: 21488

Selectively ignore thrown exceptions in C# code

I have a function in C# code where a NullReferenceException is thrown periodically (expected behavior), but caught. Is there a way I can tell the Visual Studio debugger to not break on this exception for this particular section of my code?

EDIT I need to break on this exception elsewhere in my code, but not in the same function.

Upvotes: 7

Views: 4919

Answers (3)

P.Brian.Mackey
P.Brian.Mackey

Reputation: 44295

Assuming the exception does not bubble up to the caller, this can be achieved with DebuggerHiddenAttribute.

From the remarks

the Visual Studio 2005 debugger does not stop in a method marked with this attribute and does not allow a breakpoint to be set in the method.

    [DebuggerHidden]
    private static void M()
    {
        try
        {
            throw new NullReferenceException();
        }
        catch (Exception)
        {
            //log or do something useful so as not to swallow.
        }            
    }

Upvotes: 2

Mike Dinescu
Mike Dinescu

Reputation: 55760

If I understand correctly and what you're trying to do is debug some NullReferenceException(s) but want to temporarily ignore others while debugging, you might be able to do this by marking functions that you want the debugger to ignore with the DebuggerNonUserCode attribute.

[DebuggerNonUserCode]
private void MyMethod()
{
    // NullReferenceException exceptions caught in this method will
    //  not cause the Debugger to stop here..
}

NOTE that this will only work if the exceptions are caught in said methods. It's just that they won't cause the debugger to break if you have the debugger set to always break on NullReferenceException exceptions. And that this only works on methods, and not arbitrary sections of code inside of a method..

Upvotes: 12

Pondidum
Pondidum

Reputation: 11637

You can do this, but it does effect all exceptions in the solution.

Debug -> Exceptions -> Find... "Null Ref", de-tick Thrown.

Upvotes: 0

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