渐变色背景

1、实现渐变色背景

 private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Paint_Background(this.Left,this.Width,this.Height, e);
        }

        private void Paint_Background(int Left, int Width, int Height, PaintEventArgs e)
        {
            Rectangle r = new Rectangle(Left, 0, Width, Height);
            System.Drawing.Drawing2D.LinearGradientBrush brush =
                new System.Drawing.Drawing2D.LinearGradientBrush(
                    r, 
                    Color.FromArgb(175, 210, 255),                                //颜色1
                    Color.White,                                                  //颜色2
                    System.Drawing.Drawing2D.LinearGradientMode.Vertical);
            e.Graphics.FillRectangle(brush, e.ClipRectangle);
        }