public class Game1 : Game
{
  [...]
  private void ShootLaser()
  {
      int width = 20;
      int height = 50;
      Rectangle rect = new Rectangle(_playerShip.Rectangle.X + _playerShip.Rectangle.Width / 2 - width / 2,
                                     _playerShip.Rectangle.Y, width, height);

      var laser = new Laser(rect, _laserTexture);
      _playerSipLasers.Add(laser);
  }

  private void MovePlayerLasers()
  {
      foreach (var laser in _playerSipLasers)
          laser.MoveUp();
  }

  [...]
}