I\'ve just noticed that if I add an event using a generic eventhandler to my UserControl, the event is not visible in the designer when I add the user control to a form.
The Windows Forms designer has limited support for generic types. It will work okay when you avoid the generic type argument for EventHandler:
EventHandler
public class TEventArgs : EventArgs { } public class MyEventArgs : TEventArgs { } public event EventHandler EventNowAlsoVisibleInDesigner;