Global application file. (C#) : Global.asax « ASP.Net Instroduction « ASP.NET Tutorial

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3. Global.asax

Use this file to define global variables.
React to global events (such as when a web application first starts).

<%@ Application Language="C#" %>

<script runat="server">

    protected void Application_OnEndRequest()
    {
        Response.Write("<hr>This page was served at " + 
         DateTime.Now.ToString());
    }

       
</script>