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Asked: 2026-06-12T05:35:43+00:00

Is it possible to attach two debugger to one process ? Recently, I had

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Is it possible to attach two debugger to one process ?

Recently, I had developed a Metro Style App in HTML5/CSS and that was calling a Window Runtime Component written in C#. What I wanted to do was attach two debugger to same process. One at JavaScript & another at C# code.

The Step I followed:

I opened two visual studio instances targeting same solution.

  • I put a breakpoint in JavaScript code and f5/run the application via VS instance 1.
  • But, when I tried to attach 2nd debugger in C# window runtime component via VS instance 2 it gives me a dialog saying “Debugger already attached to process”.

I’ve seen a Window Runtime presentation in which the speaker did the same successfully. Kindly, help me out with this.

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1 Answer

  1. Editorial Team

    That’s not possible.

    See here:

    For both managed-only and native-only debugging, you can only attach 1
    debugger to a process.

    Why?

    The native debugger steals debug events
    from underneath the managed debugger. This confuses the
    managed-debugger and will cause it to crash. The native debugger has
    no way of coordinating with the managed-debugger here.

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