I believe there is an error in the Form calculateRealOnlyButton_Click
Sorry about that. I'm sure you're right and it sounds like you've diagnosed the problem. I'm sure it was a copy-and-paste error.
There are ways to make console information visible to the user but mostly this is to display debugging information to you while you are running in to Visual Studio. By default in a Windows Forms application things that you write into the console window appear in the Output window.
If you can't find the Output window, open the Debug menu's Windows submenu and pick Output.