void IHelpService.ClearContextAttributes() { if (_Context != null) { NativeMethods.ThrowOnFailure(_Context.RemoveAttribute(null, null)); if (_SubContextList != null) { foreach (object obj2 in _SubContextList) { IHelpService service = obj2 as IHelpService; if (service != null) { service.ClearContextAttributes(); } } } } NotifyContextChange(_Context); }