What is the difference between /// and #region in c#?

Question

What is the difference between ///

and #region ...#endregion statements in c#? Which one the best?

Answer 1

A region is used to collapse a large area of code and the // is used to add notes without the computer reading it.

#region your large code
loads of code in this area.
#endregion

//This is just a note that the computer won't read.