use class file in web form

Question

Hello,

 

I have a class file "customer.cs". location of class file is:

 

App_Code > BL (Folder) > customer.cs

 

some part of code:

 

Namespace PlaceTheBall.BE

Public Class clsBEBalls

{

code....

}

 

I have a page login.aspx which is in admin folder.

 

Admin(folder) > login.aspx

 

How to call customer.cs in login.aspx?

 

I am trying like this:

 

using PlaceTheBall.BE

 

But it is not working.

 

Please help