C# Winfrom项目，webBrowser控件怎么控制网页的显示比例

C# Winfrom项目中，有个webBrowser控件，大小为：900*540。webBrowser控件中内嵌的网页大小为：1000*600。
怎么样让网页的整体内容缩小到90%后再嵌入到webBrowser控件中显示呢?

请问，能不能提供相关的源码或参考资料。谢谢！

this.webBrowser1.Document.Body.Style = "zoom:1.0";

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Myfirstprogram
{
public partial class Client : Form
{
public Client()
{
InitializeComponent();
this.Load += new EventHandler(Client_Load);
webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);

    }

    private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {
        if (webBrowser1.ReadyState != WebBrowserReadyState.Complete) return;
        Size szb = new Size(webBrowser1.Document.Body.OffsetRectangle.Width,
        webBrowser1.Document.Body.OffsetRectangle.Height);
        Size sz = webBrowser1.Size;

        int xbili = (int)((float)sz.Width / (float)szb.Width * 100);//水平方向缩小比例
        int ybili = (int)((float)sz.Height / (float)szb.Height * 100);//垂直方向缩小比例
        if(xbili<ybili) 

webBrowser1.Document.Body.Style = "zoom:" + xbili.ToString() + "%";
else
webBrowser1.Document.Body.Style = "zoom:" + ybili.ToString() + "%";
webBrowser1.Invalidate();

    }

    private void Client_Load(object sender, EventArgs e)
    {
        webBrowser1.Navigate("http://www.csdn.net/");
        webBrowser1.ScriptErrorsSuppressed = false;
        webBrowser1.ScrollBarsEnabled = false;
    }

}

}

这样还不行，有滚动条。这样让它整体通过缩放百分比的方式显示在webBrowser控件中呢?