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

You can use it to use the reserved keywords as variable name like

 int @int = 3; 

the compiler will ignores the @ and compile the variable as int

it is not a common practice to use thought