I know this is a very silly and easy problem, but I can't figure it out by myself.
I wrote my first program in C#. In order to debug it, I've been using an online compiler, but I ran out of free runs, and I know that I need to learn to use MonoDevelop soon anyways.
It looks like a perfect environment for writing and running C# programs even on a mac, but I still can't add a program to a solution of a project, so I can't get it compiled.
Any advice will be highly appreciated!