I have to admit that that license technique does work. I can't find any official Microsoft documentation about it, so I have to consider it an undocumented feature that can be removed at any time. Still doesn't solve the base problem that I compiled your control into my control with a valid run time...

This work around for licensing in not acceptable for my application. I compile TChart into another .Net control. Users of that control have no access whatsoever to any design time functionality of TChart, and I expect that they will be able to use my design time functionality in their projects witho...