RandomizeStrings

static Random _random = new Random();
        public static string[] RandomizeStrings(string[] arr) {

            List<KeyValuePair<int,string>> list = new List<KeyValuePair<int,string>>();
            // Add all strings from array
            // Add new random int each time
            foreach(string s in arr) {
                list.Add(new KeyValuePair<int,string>(_random.Next(),s));
            }
            // Sort the list by the random number
            var sorted = from item in list
                         orderby item.Key
                         select item;
            // Allocate new string array
            string[] result = new string[arr.Length];
            // Copy values to array
            int index = 0;
            foreach(KeyValuePair<int,string> pair in sorted) {
                result[index] = pair.Value;
                index++;
            }
            // Return copied array
            return result;
        }