MasterPage Inherit class file (CodeFileBaseClass)

[calvin]

Have a master page, need to inherit from a class(Core.vb) which store in "App_Code", inside the class file have many variable are declared and functions etc.

 

In the master page, I have set CodeFileBaseClass = "Core"

<%@ Master Language="VB" CodeFile="MasterPage.master.vb" Inherits="MasterPage" CodeFileBaseClass="Core" %>

 

But I get Could not load type 'Core' error

 

Anyone could help me?