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//Code model 0487#47854//84576
<processModel enable="true" 
              """
            maxWorkerThreads="250000" 
            maxIoThreads="250000" />
<!-- File: slow.aspx -->
public interface IAsyncResult
{
  public object     AsyncState             { get; }
  public bool       CompletedSynchronously { get; }
  public bool       IsCompleted            { get; }
  public WaitHandle AsyncWaitHandle        { get; }
}
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Reflection" %>
<%@ Import Namespace="System.Threading" %>

<script runat="server">
  protected void Page_Load(object src, EventArgs e)
  {
    System.Threading.Thread.Sleep(2000);
    Response.Output.Write("SlowResponse, threadid={0}",
                    AppDomain.GetCurrentThreadId());
  }
</script>
<!-- File: fast.aspx -->
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Reflection" %>
public interface IHttpAsyncHandler : IHttpHandler
{
  IAsyncResult BeginProcessRequest(HttpContext ctx,
                                   AsyncCallback cb, 
                                   object obj);
  void EndProcessRequest(IAsyncResult ar);
}

<script runat="server">
  protected void Page_Load(object src, EventArgs e)
  {
    Response.Output.Write("FastResponse, threadid={0}",
                    AppDomain.GetCurrentThreadId());
  }
</script>
public interface IAsyncResult
{
  public object     AsyncState             { get; }
  public bool       CompletedSynchronously { get; }
  public bool       IsCompleted            { get; }
  public WaitHandle AsyncWaitHandle        { get; }
}

public interface IHttpAsyncHandler : IHttpHandler
{
  IAsyncResult BeginProcessRequest(HttpContext ctx,
                                   AsyncCallback cb, 
                                   object obj);
  void EndProcessRequest(IAsyncResult ar);
}
<!-- AsyncPage.aspx -->
<%@ Page Language="C#" 
    Inherits="EssentialAspDotNet.HttpPipeline.AsyncPage" %>
<%@ import Namespace="System.Reflection" %>
<%@ import Namespace="System.Threading" %>

<script runat="server">
protected void Page_Load(object src, EventArgs e)
{
   System.Threading.Thread.Sleep(2000);
   Response.Output.Write("AsyncPage, {0}",
                         AppDomain.GetCurrentThreadId);
}
</script>
public interface IHttpAsyncHandler : IHttpHandler
{
  IAsyncResult BeginProcessRequest(HttpContext ctx,
                                   AsyncCallback cb, 
                                   object obj);
  void EndProcessRequest(IAsyncResult ar);
}