Http compression

Hi..i have to use compression in .net so that downtime of the page decrease.I have use the following code
public class httpclass1:IHttpModule
    {
        #region IHttpModule Members

        public void Dispose()
        {
            throw new Exception("The method or operation is not implemented.");
        }
        public void Init(HttpApplication context)
        {
            //throw new Exception("The method or operation is not implemented.");
            context.BeginRequest+=new EventHandler(context_BeginRequ ...