My programm:
static void Main(string[] args)
        {
            int d = new int();
            int n = new int();
            int k = new int();
            int k1= new int();
            int k2 = new int();
            do
            {
                Console.WriteLine("Kolichestvo N:");
                n = Convert.ToInt32(Console.ReadLine());
            }
            while (n < 1 || n > 20);
            int[] q = new int[n];
            Console.WriteLine("Vedite masiv:");
            string[] str = Console.ReadLine().Split(new char[] { ' ', '\n', '\t' }, StringSplitOptions.RemoveEmptyEntries);
            for (int i = 0; i < (n < str.Length ? n : str.Length); i++)
            {
                d = Convert.ToInt32(str[i]);
                if (d >= 1 & d <= 100000)
                    q[i] = d;
            }
            Array.Sort(q);
            Array.Reverse(q);
            k1 = q[0];
            k2 = q[1];
            for (int i = 2; i <q.Length; i++)
            {
                if (k1 > k2)
                    k2 = k2 + q[i];
                else k1 = k1 + q[i];
            }
            if (k1 > k2)
                k = k1 - k2;
            else
                k = k2 - k1;
            Console.WriteLine(k);

Maybe because you write text before typing =)

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