C# panel move with collision

Question

I am new to C# and Winforms and try to make a moving panel. It should move right until the end of my window and then back left. It should bounce from side to side. But the only

Answer 1

Here is the code I used:

int d= 10;
private void timer1_Tick(object sender, EventArgs e)
{
    //Reverse the direction of move after a collision
    if(panel1.Left==0 || panel1.Right==this.ClientRectangle.Width)
        d = -d;

    //Move panel, also prevent it from going beyond the borders event a point.
    if(d>0)
        panel1.Left = Math.Min(panel1.Left + d, this.ClientRectangle.Width - panel1.Width);
    else
        panel1.Left = Math.Max(panel1.Left + d, 0);
}

Note:

To check the collision you should check:

• Collision with left: panel1.Left==0
• Collision with right: panel1.Right==this.ClientRectangle.Width

You should not allow the panel goes beyond the borders even a point, so:

• The maximum allowed value for your panel left is this.ClientRectangle.Width - panel1.Width

• The minimum allowed value for your panel left is 0

Also It's better to use this.ClientRectangle.Width instead of using hard coded 316.