VS2010 Winforms Usercontrol changes not showing in parent form

Question

I've created a series of usercontrols. Dragged one of the controls to the main form. It shows OK. Went back and made a change to the design of the user control. Rebuilt project. Cleaned project. manually removed all project binaries including the obj folder. Change still doesn't show on the usercontrol hosted on the main form. Dragging a new instance of the control from the tool box only shows the old version of the control.
Completely removed the controls from the toolbox and adding them again fixed the problem, but surely I don't have to do this everytime I make a change? All user controls are in the same assembly as the main form. Tool>Options>Windows Forms Designer>Auto toolbox Populate is set to true. Any ideas most appreciated. Thx

Answer 1

Do not add the control to the toolbox yourself. This puts a copy of the assembly in a private directory. Yes, this copy does not get updated automatically, you get the old control.

Rely on the "Auto toolbox populate" setting. It automatically adds any controls you have in your loaded project(s) to the toolbox. The added controls are at the top of the toolbox.