Question

I’m not subclassing the control. Trying to trigger the event via Control.Size = Control.Size fails, since it does not trigger then even unless the new size is actually different.

Answer 1

If you are subclassing Control, you can call OnResize directly, or expose it on the API:

 public void OnResize() {      this.OnResize(EventArgs.Empty);  } 

However, you can’t do this for arbitrary controls. You could change the Size to-and-fro? Alternatively, you could use reflection, but that is hacky:

 typeof (Control).GetMethod('OnResize',      BindingFlags.Instance | BindingFlags.NonPublic)      .Invoke(myControl, new object[] {EventArgs.Empty});