Provides a callback mechanism that can create an instance of a service on demand.
Assembly: System (in System.dll)
[<ComVisibleAttribute(true)>] [<HostProtectionAttribute(SecurityAction.LinkDemand, SharedState = true)>] type ServiceCreatorCallback = delegate of container:IServiceContainer * serviceType:Type -> Object
- Type: System.ComponentModel.Design.IServiceContainer
The service container that requested the creation of the service.
- Type: System.Type
The type of service to create.
Return ValueType: System.Object
The service specified by serviceType, or a null reference (Nothing in Visual Basic) if the service could not be created.
provides a mechanism to publish services that you can request to have created when needed, rather than the service being created immediately when the designer loads. You can use a callback function if the service is not essential and may not be used. A service published by using a does not use as many additional resources if it is not requested and created. To use a callback function to publish your service, pass a to the AddService method of an IServiceContainer.
The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: SharedState. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.