Why does Debug.Writeline stop working for some projects in the solution?

Question

We have a solution with multiple projects after running the code from VS the output normally seen from Debug.Writeline statements just cease to appear. I mention the multip

Answer 1

Got this in VS 2015. All of a sudden all Debug.WriteLine "stops working" (not showing in Output window). After going crazy about this for about an hour I found the problem: 1. Right click In output window (output from Debug) 2. Check that "Program output" is checked