Console.ReadLine(); will hold a console app open at the current line of code until you press a key.

I've actually written one of these now, or I should say I started to at least. I hate it that so many examples of C# are console application examples. I've done this ASP.NET work for years without having to have authored a console app. Doing something and then writing it to the console is more confusing than doing something and handing it back from a class in my opinion. I'm not crazy about console application examples. They are not intuitive for learning.