using System;

​

    public class Program

    {

        public static void Main(string[] args)

        {

            Test test = new Test();

            test.Test1("a", "b");

            Console.ReadLine();

        }

    }

   public class Test

    {

        public void Test1(string name, params object [] address)

        {

            Console.WriteLine("first method");

        }

        public void Test1(string name, string age, params object[] address)

        {

            Console.WriteLine("second method");

        }

    }

​