// (实心刷) Rectangle rect1 = , , , ); SolidBrush sbrush1 = new SolidBrush(Color.DarkOrchid); SolidBrush sbrush2 = new SolidBrush(Color.Aquamarine); SolidBrush sbrush3 = new SolidBrush(Color.DarkOrange); //(梯度刷) LinearGradientBrush lbrush1 = new LinearG…