using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var d = new Dictionary<object, int>();

        var o1 = (object)1;

        var o2 = (object)2;

        var o3 = (object)1;

        d[o1] = 1;

        d[o2] = 2;

        int result;

        if (d.TryGetValue(o3, out result)) 

        {

            Console.WriteLine(result);

        }

        else 

        {

            Console.WriteLine("Nothing.");

        }

    }

}