Curious, I definitely could be wrong here as I'm a total beginner....but I believe the Console.ReadLine(); is put in to keep the console window open to see the WriteLine("string");. If the ReadLine wasn't there, the console window would just print the string and close so fast you wouldn't see it. The ReadLine keeps the console open to wait for the user to type something to close the program out.
Congrats on 100 episodes Laura and Paul. I always look forward to Monday evenings just for this show. Hopefully this show will last a long time and people will look back at Laura and Paul as a premier duo, that they will be in the same category as Roger and Ebert, Starsky and Hutch, and Siegfried and Roy,