public void move(Rectangle windowSize)
{
for (int i = balls.Count - 1; i >= 0; i--)
{
if (i >= 0)
{
Ball ball = balls.ElementAt(i);
if (ball != null && ball is RedBall)
{
RedBall redBall = (RedBall)ball;
if (redBall.clicked)
{
redBall.move(windowSize);
GreenBall green = intersectWithGreenBall(redBall);
if (green != null)
{
balls.Remove(green);
}
}
}
}
}
}
