C#Webサイトの画像生成

 public class GetImage
    {
        private int S_Height;
        private int S_Width;
        private int F_Height;
        private int F_Width;
        private string MyURL;

        public int ScreenHeight
        {
            get { return S_Height; }
            set { S_Height = value; }
        }

        public int ScreenWidth
        {
            get { return S_Width; }
            set { S_Width = value; }
        }

        public int ImageHeight
        {
            get { return F_Height; }
            set { F_Height = value; }
        }

        public int ImageWidth
        {
            get { return F_Width; }
            set { F_Width = value; }
        }

        public string WebSite
        {
            get { return MyURL; }
            set { MyURL = value; }
        }

        public GetImage(string WebSite, int ScreenWidth, int ScreenHeight, int ImageWidth, int ImageHeight)
        {
            this.WebSite = WebSite;
            this.ScreenWidth = ScreenWidth;
            this.ScreenHeight = ScreenHeight;
            this.ImageHeight = ImageHeight;
            this.ImageWidth = ImageWidth;
        }

        public Bitmap GetBitmap()
        {
            WebPageBitmap Shot = new WebPageBitmap(this.WebSite, this.ScreenWidth, this.ScreenHeight);
            Shot.GetIt();
            Bitmap Pic = Shot.DrawBitmap(this.ImageHeight, this.ImageWidth);
            return Pic;
        } 

    }
   class WebPageBitmap
   {
       WebBrowser MyBrowser;
       string URL;
       int Height;
       int Width;

       public WebPageBitmap(string url, int width, int height)
       {
           this.Height = height;
           this.Width = width;
           this.URL = url;
           MyBrowser = new WebBrowser();
           MyBrowser.ScrollBarsEnabled = false;
           MyBrowser.WebBrowserShortcutsEnabled = false;
           MyBrowser.ObjectForScripting = false;
           MyBrowser.Size = new Size(this.Width, this.Height);
       }

       public void GetIt()
       {
           MyBrowser.Navigate(this.URL);
           while (MyBrowser.ReadyState != WebBrowserReadyState.Complete)
           {
               Application.DoEvents();
           }
       }

       public Bitmap DrawBitmap(int theight, int twidth)
       {
           Bitmap myBitmap = new Bitmap(Width, Height);
           Rectangle DrawRect = new Rectangle(0, 0, Width, Height);
           MyBrowser.DrawToBitmap(myBitmap, DrawRect);
           System.Drawing.Image imgOutput = myBitmap;
           System.Drawing.Image oThumbNail = new Bitmap(twidth, theight, imgOutput.PixelFormat);
           Graphics g = Graphics.FromImage(oThumbNail);
           g.CompositingQuality = CompositingQuality.HighSpeed;
           g.SmoothingMode = SmoothingMode.HighSpeed;
           g.InterpolationMode = InterpolationMode.HighQualityBilinear;
           Rectangle orectangle = new Rectangle(0, 0, twidth, theight);
           g.DrawImage(imgOutput, orectangle);
           try
           {

               return (Bitmap)oThumbNail;
           }
           catch (Exception ex)
           {
               Console.WriteLine(ex.Message);
               return null;
           }
           finally
           {
               imgOutput.Dispose();
               imgOutput = null;
               MyBrowser.Dispose();
               MyBrowser = null;
           }
       }
   }
   public class OLayer
   {
       public void CaptureImage(string url)
       {
           System.Drawing.Bitmap x = null;
           try
           {
               // string url = "http://" + Request.Url.Host + ":" + Request.Url.Port.ToString(); 
               //url = url + UrlPath; 

               //GetImage thumb = new GetImage(url, 1024, 3200, 1024, 3200);
               // 
               GetImage thumb = new GetImage(url, 1024, 8000, 1024, 8000);
               x = thumb.GetBitmap();
               string FileName = DateTime.Now.ToString("yyyyMMddhhmmss");

               //x.Save(System.Environment.CurrentDirectory + "\\cap\\" + FileName + ".jpg");
               x.Save(System.Environment.CurrentDirectory + FileName + ".jpg");


               //CaptureState = true; 
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.ToString());
               //CaptureState = false; 
           }
           finally
           {
               if (x != null) x.Dispose();
           }
       }
   }

 OLayer ow = new OLayer();
                ow.CaptureImage(tstr[i].ToString());