C# 實現屏幕截屏

//屏幕寬
            int iWidth = Screen.PrimaryScreen.Bounds.Width;
            //屏幕高
            int iHeight = Screen.PrimaryScreen.Bounds.Height;
            //按照屏幕寬高創建位圖
            Image img = new Bitmap(iWidth, iHeight);
            //從一個繼承自Image類的對象中創建Graphics對象
            Graphics gc = Graphics.FromImage(img);
            //抓屏並拷貝到myimage里
            gc.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(iWidth, iHeight));
            //this.BackgroundImage = img;
            //保存位圖
            img.Save(@"C:\" + Guid.NewGuid().ToString() + ".jpg");