Question

What gives? My previously created user control is visible, but the newly created one is not – intellisence doesn’t show it,

I was under the impression that you don’t need to put any using statements or references in the project if the web user control is in the same project.

UPDATED:
both declarations look something like this:

public partial class CtrlClassName : System.Web.UI.UserControl

Answer 1

Make sure you have the proper @register in Default.aspx. See here for reference.

Example:

<%@ Register TagPrefix="pfx" TagName="CtrlClassName" Src="Controls/CtrlClassName.ascx" %>