Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Dice
{
    class Program
    {
        private const int MIN_DICE_ROLL = 1;
        private const int MAX_DICE_ROLL = 6;
        private const int TOTAL_ROLLS = 50;

        static void Main(string[] args)
        {
            var random = new Random();

            var list1 = RollDice(TOTAL_ROLLS, random);
            var list2 = RollDice(TOTAL_ROLLS, random);

            var compare = list1.Except(list2);
            foreach (var rollTotal in compare)
            {
                Console.WriteLine(string.Format("Roll Total: {0}", rollTotal));
            }
            Console.WriteLine(string.Format("There were {0} different rolls.", compare.Count()));
            Console.ReadKey();
        }

        private static List<int> RollDice(int totalRolls, Random randomGenerator)
        {
            var rollTotal = new List<int>();

            for (int index = 0; index < totalRolls; index++)
            {
                rollTotal.Add(RollDice(randomGenerator) + RollDice(randomGenerator));
            }

            return rollTotal;
        }

        private static int RollDice(Random randomGenerator)
        {
            return randomGenerator.Next(MIN_DICE_ROLL, MAX_DICE_ROLL + 1);
        }
    }
}