How to detect that C# Windows Forms code is executed within Visual Studio?

Question

Is there a variable or a preprocessor constant that allows to know that the code is executed within the context of Visual Studio?

Answer 1

There is a DesignMode property that you can check but in my experience it's not always accurate. You could also check to see if the executable is DevEnv.exe

Take a look here. Might make this question a dup but it all depends on what you're trying to accomplish.