Attaching a Console to a WinForms application

Very good tip. I just want to mention an alternative - you can just change your project output type to a console application. (You can undo it later if only needed for debugging). So if you started with a Windows Forms project in Visual Studio: Go to project properties/application/ and in the "output type" combobox, select Console app. Run your app and you will see all Console.WriteLine calls (...). Change back to a Windows Forms project, console is gone (no code changes needed).