using System;

​

namespace ConsoleApplication1

{

    public class Program

    {

        public static void Main()

        {

            int? foo = 1;

            int? bar = 1;

            Console.WriteLine(Equ(foo, bar));

​

            foo = null;

            bar = 2;

            Console.WriteLine(Equ(foo, bar));

​

            foo = null;

            bar = null;

            Console.WriteLine(Equ(foo, bar));

        }

​

        public static bool Equ<T>(T first, T second)

        {

            if (default(T).Equals(first) &&

                default(T).Equals(second))

                return true;

​

            return first.Equals(second);

        }

    }

}

​