public void AddWaterMarkTest() { Bitmap WaterMarkImg = new Bitmap(@"D:\Images\WaterMarkImg.png"); Bitmap BackImg = new Bitmap(@"D:\Images\banner.png"); int Width = BackImg.Width - WaterMarkImg.Width; int Height = BackImg.Height - WaterMarkImg.Height - 15; if (Width > 0 && Height > 0) { Point p = new Point(Width, Height); Bitmap img = ImageManager.AddWaterMark(BackImg, WaterMarkImg, p); img.Save(@"D:\Images\test.jpg"); } }