What is C# Comments ?
Comments can be used to explain C# code , and to make it more readable .It can also be used to prevent execution when testing alternative code .
Two types of C# Comments :
* C# Single -line comments
* C# Multi - line comments
C# Single -line comments :
* Single -line comments start with two forward slashes ( // ) .
* Any text between // and the end of the line is ignored by C# (will not be executed)
                  The example uses a single -line comment before a line of code :

 C# Multi - line comment :
                      * Multi - line comments start with /* and ends with */ .
                        * Any text between / * and */ will be ignored by C# .
NOTE :
            Single or Multi - line comment : 
                     It is up to you which you want to use . Normally , we use // for short comments , and /* */ for longer.
