Visual Studio Debugger not attaching to Unity

Question

I\'m having issues getting Visual Studio\'s debugger to attach to Unity - editing and compiling scripts inside VS is working fine - however, when clicking \"Attach to Unity\

Answer 1

This was killing me too. After going through everything installed in the last few days and uninstalling and reinstalling, I determined that the latest Xamarin broke VSTU integration. I even reverted to VSTU 2.1 to no avail.

Only uninstalling Xamarin allowed the debugger to attach to Unity.

So for now, we have to use either Xamarin or VSTU, but not both on the same machine if we want the VS debugger to attach to Unity.