using System;

public class Program

{

    public static void Main()

    {

         Gen<int> genint = new Gen<int>();

            genint.Add(5, 6);

            Gen<string> genfloat = new Gen<string>();

            string s1 = "hello";

            string s2 = "world";

            genfloat.Add(s1, s2); 

    }

  class Gen<T>

        {

           public T Add (T a1,T a2)

            {

            dynamic a = a1;

            dynamic b = a2;

            Console.WriteLine(a + b);

            return a + b;

            }

         }

}

​