1) In C#, params is a keyword.
2) Using the params keyword, we can specify a method parameter that takes a variable number of arguments.
3) The parameter type must be a single-dimensional array.
4) No additional parameters are permitted after the params keyword in a method declaration.
5) only one params keyword is permitted in a method declaration.
6) If the declared type of the params parameter is not a single-dimensional array, compiler error
