以下是代码片段：
//环境VS2005，WinXPSP2  

   //test.txt 为html源代码  

         private void Form1_Load(object sender, EventArgs e)  

          {  

              string str = null;  

             StreamReader sr = new StreamReader("D:\\test.txt", Encoding.Default);  

             webBrowser1.Navigate("about:blank");  

             webBrowser1.Document.OpenNew(true);  

              str = sr.ReadToEnd();  

             webBrowser1.Document.Write(str);  

          }