[2.0] Specify a UserControl as a template on another UserControl

I have a user control, called Repeater, that dynamically adds a variable number of other user controls to itself. I'm wondering how I can make the Repeater class generic so I can pick from a list of other User Control types in the project to use as the template control without an instance of the User Control on the form.

I thought of using a templated constructor such as turning public partial class Repeater : UserControl into public partial class Repeater<TypeName> : UserControl
but immediately get an error:
Error 1 'TableLayoutPanelTest.Repeater.Dispose(bool)': no suitable method found to override

I knew the designer would throw a fit.