C#實現網頁截圖功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
//需要添加System.Drawing及System.Windows.Forms引用 
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Windows.Forms;

namespace PageNumber
{
    class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            string url = "http://www.531.hk/";
            GetImage thumb = new GetImage(url, 1024, 768, 1024, 768);
            System.Drawing.Bitmap x = thumb.GetBitmap();
            string FileName = DateTime.Now.ToString("yyyyMMddhhmmss");
            x.Save(@"C:" + FileName + ".jpg");
            Console.WriteLine(@"C:" + FileName + ".jpg 保存成功.");
            Console.ReadKey();
        }

        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.Size = new Size(this.Width, this.Height)