The cause for this is Visual Studio debugger was unable to connect to the started Emulator through the ADB (Android Debug Bridge). I was having a already built solution and up and running Emulator, but the VS couldn’t connect to the Emulator. You must keep in mind that my project was building fine, and the Emulator also started running successfully and booted up itself.

So let me post the solution for you right here.

So after Googling a while I figured out the problem thanks to wasting a bunch on hours on google search and forums, since many others were also having the same issue. Specifically the build log was on a hang state after “Emulator is already running” step, as I saw in the output log in VS. The project was successfully building itself, and the Visual Studio Android Emulator also started running successfully, but then the build process was on a hang state after the Emulator started running. So few days back after doing a fresh installation on my WIndows 10 laptop, and installing Visual Studio, I tried running a Xamarin Forms project, with the Visual Studio Android Emulator.

Android studio emulator already running