public static void playRandomFromFolder(string relpath, bool checkIfInLast)
        {
            try
            {
                string currentdir = Environment.CurrentDirectory;
                string[] Files = Directory.GetFiles(currentdir + relpath);
                Random randNum = new Random();
                List<string> list_paths = (from c in lastFiveActive select c.FileName).ToList();

                string randomFile = "";
                int i = 0;
                while (true)
                {
                    int zufall = randNum.Next(0, Files.Length);
                    if (!list_paths.Contains(Files[zufall]) || i > 10)
                    {
                        randomFile = Files[zufall];
                        break;
                    }

                }

                MP3Player playIt = new MP3Player();
                playIt.Open(randomFile);
                playIt.Play();
            }
            catch (Exception err)
            {
                MessageBox.Show(err.Message);
            }

        }
        private void stackLastFive(MP3Player latest)
        {
            if (lastFiveActive.Count() > 5)
            {
                lastFiveActive.Reverse();
                lastFiveActive = lastFiveActive.Take(4).ToList();
            }
            lastFiveActive.Add(latest);

        }