public virtual void RemoveChild(GuiWidget childToRemove)
{
if (!Children.Contains(childToRemove))
{
throw new InvalidOperationException("You can only remove children that this control has.");
}
childToRemove.ClearCapturedState();
childToRemove.hasBeenRemoved = true;
Children.Remove(childToRemove);
childToRemove.parent = null;
childToRemove.OnParentChanged(null);
OnChildRemoved(new GuiWidgetEventArgs(childToRemove));
OnLayout(new LayoutEventArgs(this, null, PropertyCausingLayout.RemoveChild));
Invalidate();
}