class ScreenshotComponent : GameComponent
    {
        public ScreenshotComponent(Game game)
            : base(game)
        {
            KeyboardHelper.OnKeyPressed += new KeyboardHelper.KeyEventHandler(KeyboardHelper_OnKeyPressed);
        }

        void KeyboardHelper_OnKeyPressed(Keys key)
        {
            if (key == Keys.F12)
                TakeScreenshot();
        }

        void TakeScreenshot()
        {
            // Get the graphics device service
            IGraphicsDeviceService graphicsDeviceService = (IGraphicsDeviceService)Game.Services.GetService(typeof(IGraphicsDeviceService));

            // Prepare a texture to save the screenshot into
            Texture2D ss = new Texture2D(graphicsDeviceService.GraphicsDevice, graphicsDeviceService.GraphicsDevice.DisplayMode.Width, graphicsDeviceService.GraphicsDevice.DisplayMode.Height, 1, ResourceUsage.ResolveTarget, graphicsDeviceService.GraphicsDevice.DisplayMode.Format, ResourceManagementMode.Manual);

            // Resolve the back buffer into the screenshot
            graphicsDeviceService.GraphicsDevice.ResolveBackBuffer(ss);

            // Find the next unused screenshot file in the format ssxxx.jpg, where xxx is a three digit number
            DirectoryInfo dir = new DirectoryInfo(Directory.GetCurrentDirectory());
            if (dir.GetDirectories("ss").Length > 0)
                dir = dir.GetDirectories("ss")[0];
            else
                dir = Directory.CreateDirectory("ss");
            FileInfo[] files = dir.GetFiles("ss*.jpg", SearchOption.TopDirectoryOnly);
            int highestSS = 1;
            if (files.Length > 0)
            {
                string[] splits = files[files.Length - 1].Name.Split(new string[] { "ss", "." }, StringSplitOptions.RemoveEmptyEntries);
                highestSS = int.Parse(splits[0]);
            }
            highestSS++;

            // save the screenshot in the format ssxxx.jpg where xxx is a three digit number
            if (highestSS < 10)
                ss.Save("ss\\ss00" + highestSS + ".jpg", ImageFileFormat.Jpg);
            else if (highestSS < 100)
                ss.Save("ss\\ss0" + highestSS + ".jpg", ImageFileFormat.Jpg);
            else
                ss.Save("ss\\ss" + highestSS + ".jpg", ImageFileFormat.Jpg);

            // dispose the screenshot texture
            ss.Dispose();
        }
    }