I have several asp.net 2.0 apps written in VS2005 in C#. For each one,
I like to create and track page view events, increment counters, etc.
I do this in a block on each page, like this...

protected void Page_Load(object sender, EventArgs e)
{
  if(!this.Page.IsPostBack)
  {
     Event.Write(EventSource.UserActivity,EventType.Informational,"My
event text");
     Counter.Hit(WebPage.MyPage);
  }
}

Now, for the problem. I noticed that many events are being written
twice, and many counters are being incremented twice when viewing the
page only once. When I set a breakpoint inside the code block above,
for any page named "Default.aspx" (no matter where it is in the folder
structure) the lines inside the code block execute twice. If I rename
the page to something else, they execute only once, as expected.

Does anyone know what causes this? How can I fix it?