protected override void OnPaint(PaintEventArgs e)
{
e.Graphics.Clear(BackColor);
using (var pen = new Pen(new SolidBrush(Color.Black)))
{
for (int x = 0; x < CellCountX; x++)
{
for (int y = 0; y < CellCountY; y++)
{
e.Graphics.DrawRectangle(pen, new Rectangle(
x * CellWidth, y * CellHeight, CellWidth, CellHeight));
}
}
}
game.OnDraw(e.Graphics);
base.OnPaint(e);
}