จากคำสั่งนี้ผมจะใส่สีพื้นหลัง (ฺBackColor) และจะกึ่งกลาง (Center) ยังไงครับ

private void Form1_Paint(object sender, PaintEventArgs e)
        {

            using (Bitmap buffer = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
            {
                using (Graphics graphics = Graphics.FromImage(buffer))
                {
                    graphics.CompositingMode = CompositingMode.SourceCopy;
                    graphics.FillRectangle(new SolidBrush(Color.FromArgb(0x40, 0, 0xff, 0)), 10, 10, 500, 80);
                    graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
                    graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
                    TextRenderer.DrawText(graphics, "Hello World  By TOR@Chemistry", this.Font,new Point(170,50), Color.Black);
                }

                e.Graphics.DrawImageUnscaled(buffer, this.ClientRectangle);
            }
        }