Asteroids.Game1.ResetLevel C# (CSharp) Метод

        public void ResetLevel()
        {
            for (int i = 0; i < numOfAsteroids; i++)
            {
                rndNum = r.Next(1, 3);

                switch (rndNum)
                {
                    case 1:
                        rnd2 = r.Next(0, screenHeight);
                        rnd1 = r.Next(-100, 0);
                        break;
                    case 2:
                        rnd2 = r.Next(screenHeight, screenHeight + 100);
                        rnd1 = r.Next(0, screenWidth);
                        break;
                    default:
                        System.Windows.Forms.MessageBox.Show("oeps");
                        rnd1 = 0;
                        rnd2 = 0;
                        break;
                }
                double speed = r.NextDouble() * 3 * Math.PI;
                System.Threading.Thread.Sleep(1);
                double angle = r.NextDouble() * 2 * Math.PI;
                asteroid.Add(new Asteroid(new Vector2(rnd1, rnd2), r.Next(1, 4), (float)speed, dir = new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle)), Content));
            }
        }