Here is the sequence of events that are raised whenever you request a page: : Page Events « Page Lifecycle « ASP.NET Tutorial

1. PreInit
   2. Init
   3. InitComplete
   4. PreLoad
   5. Load
   6. LoadComplete
   7. PreRender
   8. PreRenderComplete
   9. SaveStateComplete
  10. Unload


<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = "Page Load";
    }

    void Button1_Click(object sender, EventArgs e)
    {
        Label1.Text += "<br />Button Click";
    }

    void Page_PreRender()
    {
        Label1.Text += "<br />Page PreRender";
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show Page Events</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <asp:Button
        id="Button1"
        Text="Click Here"
        OnClick="Button1_Click"
        Runat="server" />

    <br /><br />

    <asp:Label
        id="Label1"
        Runat="server" />

    </div>
    </form>
</body>
</html>

5.3.Page Events
	5.3.1.	Here is the sequence of events that are raised whenever you request a page:
	5.3.2.	Error event example
	5.3.3.	Page events firing sequence (VB.net)
	5.3.4.	Page life cycle events
	5.3.5.	Page flow tracing
	5.3.6.	Unload event example