“A specified communication resources(port) is already in use” when attaching the debugger

Question

I have just upgrade my windows phone 8 to windows phone 8.1. When I connect my phone to pc and run my project it gives me

Answer 1

If you're getting this error when trying to debug a Xamarin App targeting a Windows Phone emulator, make sure you have Deploy ticked for the WinPhone project:

Solution > Properties > Configuration Properties > Configuration