Visual Studio 2017 studio showing error 'This application is in break mode' and throws unhandled exception

I'm surprised yet not best answer posted for this issue. For me above solutions didn't work. To resolve this issue, I'd to disable following option from debug menu.

Debug > Options > General > Uncheck "Enable Just My Code"

For more details, check microsoft msdn help.

You should be getting exception details and a call stack, which will greatly aid in your debugging efforts. I think this is a bug with Xamarin on VS2017 right now.