What's the use/meaning of the @ character in variable names in C#?

Question

I discovered that you can start your variable name with a \'@\' character in C#. In my C# project I was using a web service (I added a web reference to my project) that was

Answer 1

It simply allows you to use reserved words as variable names. I wanted a var called event the other day. I was going to go with _event instead, but my colleague reminded me that I could just call it @event instead.