Cms save problem when try to save the html page to server

Hi!

I am new to cms i am using this code to copy the whole page and save it
to C drive of mys server. When i am saving i am losing all cms content
from the page.

System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new
System.Web.UI.HtmlTextWriter(oStringWriter);
Page.RenderControl(oHtmlTextWriter);
oHtmlTextWriter.Flush();
System.IO.FileStream fs = new
System.IO.FileStream(@"C:\temp\test.htm",System.IO.FileMode.Create);

string s= oStringWriter.ToString();
byte[] b = System.Text.Encoding.UTF8.GetBytes(s);
fs.Write(b,0,b.Length);
fs.Close();
Response.End();