C# winform 中CS结构,客户端怎么获取截屏,获取图片,把图片保存到服务器图片文件夹里面?

Rectangle r = ScreenPrimaryScreenBounds;
Image img = new Bitmap(rWidth, rHeight);
Graphics g = GraphicsFromImage(img);
gCopyFromScreen(new Point(0, 0), new Point(0, 0), rSize);
imgSave("c:\tmpjpg");

---