It is said that Application_PreSendContent() should fire before the ASP.NET page framework sends content to a requesting client (browser). This is what I have in the Global.asax:

    Sub Application_PreSendContent(ByVal sender As Object, ByVal e As EventArgs)
        Throw New System.Exception("laasasdf")
        LXFramework.PreSendContent()
    End Sub

This event does not fire.