Visual studio can't debug Android Xamarin app
I was having the same problem and I found this workaround with Hyper-V in Xamarin's documentation: https://developer.xamarin.com/guides/android/deployment,_testing,_and_metrics/debug-on-emulator/visual-studio-android-emulator/
TL;DR; Open Hyper-V Manager -> Go to settings on your emulator -> Go to processor settings -> Select Compatibility -> Mark the "Migrate to a physical computer with a different processor version" checkbox -> Done! (At least for me) VS is now debugging my Android App
Another reason why Visual studio can't debug Android Xamarin app with a Hyper-V is due to you don´t have 'Deploy" option check in android project.
Steps: 1) Enter in "Solution properties" 2) Select "Configurarion Properties" 3) Check "Deploy" in Android project.
Make sure you are running on Debug mode (on target).
Then, check the Properties of the App Project and see if it's using the Xamarin debugger instead of the VisualStudio Debugger.