bajas

        protected void MakeList() {

            String[] names = new String[]
                {"John",
                "Jack",
                "Anna",
                "Lisa",
                "Sean",
                "Peter",
                "Paul",
                "Tom",
                "Kenneth",
                "Pablo",
                "Christian",
                "Andre"};

            int count = names.Length;

            double pair = ((count / 2) - 0.5) * count;

            String[] pairs = new String[(int)pair];

            int i = 0, j = 0, k = 0, l = 0;

            for (i = 0; i < names.Length; i++)
            {
                string first = names[i];
                for (j = l; j < names.Length; j++)
                {
                    string second = names[j];
                    if (first != second) {
                        pairs[k] = String.Format("{0} and {1}", first, second);
                        k++;
                    }
                }
                l++;
            }

            foreach (String name in pairs)
                    Console.WriteLine(name);
        }