C# Questions

I need some help with some C# questions. I am new to C# and don't know much. Can you guys help?

01. If a method does not return a value its return type is?

I'm sorry, I didn't actually mail him because I don't have a junk email address. I lied to you and Ｉ　ｆｅｅｌ　ｋｉｎｄ　ｏｆ　ｂａｄ　ａｂｏｕｔ　ｉｔ　：（
I'd be obliged it someone actually mailed him the thread.

Thank you.