Example of using params parameters for c#

class parameters
    {
        public void doSome(string str,params int[] values){
            if (values != null && > 0)
            {
                for (var i = 0; i < ; i++)
                {
                    (str + "," + values[i]);
                }
            }
            else {
                (str);
            }
        }
        static void Main() {
Parameter c = new parameter();
            ("a");
            ("b",1);
            ("c",1,2,3);
            int[] arr = { 1, 5, 7 };
            ("d",arr);
        }
    }