Question

How I can read the output Request (myxmlData) before sending to the client in EndRequest event or other event?

protected void Page_Load(object sender, System.EventArgs e)
{
  string myxmlData = MyObject.DataXML();

  Response.ContentType = "text/xml";
  Response.Write(myxmlData);
  Response.End();
}

Answer 1

Probably the easiest way to do what you want is to use ASP.NET Response Filters. They give you access to the final output before it is sent to the client.

A quick example of an ASP.NET Response Filter should get you started.

Good luck!