This method raises the IComponentChangeService.ComponentChanging event.

Most designers included with the winsdklong, as well as the Visual Studio design-time environment, typically raise this event automatically; so most of the time, you do not need to explicitly call this method. The appropriate System.ComponentModel.Design.IComponentChangeService events are automatically raised when a System.ComponentModel.PropertyDescriptor is used to change a property value or components are added or removed from the System.ComponentModel.Design.IDesignerHost container.