The LinearGradientBrush class of c#--gdi+

namespaces: System.Drawing.Drawing2D

The LinearGradientBrush object fills the shape with a color linear gradient. In short, a color ramp contains a color that fades between two specified colors, and the direction of the gradient is a straight path along a specified angle. For example:

 1 Private voidForm1_paint (Objectsender, PaintEventArgs e)2 { 3Graphics g =E.graphics;4LinearGradientBrush LGB =NewLinearGradientBrush (NewPoint (0,0), 5     NewPoint ( -,Ten), 6Color.White,7Color.Black); 8G.fillrectangle (LGB, This. ClientRectangle); 9LGB. Dispose ();Ten}

The graph is:

Use a rectangular gradient:

 1  Private voidForm1_paint (Objectsender, PaintEventArgs e)2 { 3Graphics g =E.graphics;4LinearGradientBrush LGB =NewLinearGradientBrush (NewRectangle (0,0, -, -), 5Color.White,6Color.Black,7      75f); 75f means angle 8G.fillrectangle (LGB, This. ClientRectangle); 9LGB. Dispose ();Ten }

The LinearGradientBrush class of c#--gdi+