Add UserControl To Another Within A C# Library?

Jan 25, 2010

I have a C# library that gets built and gets placed into my website's bin folder. In my C# library I have a .ascx file and I'm trying to put another .ascx control in there. But I get this error:

Could not resolve type for tag "fb:FormBuilder". Make sure the proper namespace is registered.

This is in the top of my user control that I want to add to others:

<%@ Control Language="C#" Inherits="System.Web.UI.UserControl, ITextControl" %>

In my parent control, I have this:

<%@ Control Language="C#" %>
<%@ Register TagPrefix="fb" TagName="FormBuilder" Src="~/Resources/ControlTemplates/Backend/FormBuilder.ascx" %>
....
<fb:FormBuilder runat="server" id="FormCode"></fb:FormBuilder>

All my files are set as the Build Option as being "Embedded Resource" (.NET 3.5).

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