C〓グラデーションのアルゴリズム

C〓〓のグラデーションの色の計算方法を一つください.

            Color sourceColor = Color.Blue;
            Color destColor = Color.Red;
            int redSpace = destColor.R - sourceColor.R;
            int greenSpace = destColor.G - sourceColor.G;
            int blueSpace = destColor.B - sourceColor.B;
            Graphics g = pictureBox1.CreateGraphics();
            for (int i = 0; i <= 100; i++)
            {
                Color vColor = Color.FromArgb(
                    sourceColor.R + (int)((double)i / 100 * redSpace),
                    sourceColor.G + (int)((double)i / 100 * greenSpace),
                    sourceColor.B + (int)((double)i / 100 * blueSpace)
                );
                g.DrawLine(new Pen(vColor), new Point(10 + i, 0), new Point(10 + i, 150));
            }
            g.Dispose();