try

        {

            using (Bitmap sinImage = new Bitmap(360, 120))

            {



                using (Graphics myGraphics = Graphics.FromImage(sinImage))

                {



                    myGraphics.Clear(Color.White);

                    myGraphics.SmoothingMode = SmoothingMode.AntiAlias;

                    Rectangle r1 = new Rectangle(0, 0, 360, 20);

                    Rectangle r2 = new Rectangle(0, 20, 360, 40);

                    Rectangle r3 = new Rectangle(0, 60, 360, 40);

                    Rectangle r4 = new Rectangle(0, 100, 360, 20);



                    Brush brush1 = new SolidBrush(Color.White);

                    Brush brush2 = new SolidBrush(Color.SkyBlue);

                    Brush brush3 = new SolidBrush(Color.Pink);

                    Brush brush4 = new SolidBrush(Color.YellowGreen);