Hide code of Global.asax ??

Hello!
My problem is i want to hide my code in "global.asax" file.
when i create a .asax file .It look like:
<%@ Application Language="C#" %>



And i don't want appear the code like that.Maybe i have the library to store it??
I want my code in .asax file like this:
<%@ Application Codebehind="Global.asax.cs" Inherits="library.Global" Language="C#" %>
Give me some advice!!Thanks