private void panel2_MouseDown(object sender, MouseEventArgs e)
        {
            bevegForm = 1;
            bevegX = e.X;
            bevegY = e.Y;
        }

        private void panel2_MouseMove(object sender, MouseEventArgs e)
        {
            if (bevegForm == 1)
            {
                this.SetDesktopLocation(MousePosition.X - bevegX, MousePosition.Y - bevegY);
            }
        }

        private void panel2_MouseUp(object sender, MouseEventArgs e)
        {
            bevegForm = 0;
        }