The System.ComponentModel.Design.Serialization.IDesignerLoaderHost that is passed to the host parameter is typically the same object as the designer host. Through this reference to the loader host, the designer loader can reload the design document and indicate that it has finished loading the design document.

Namespace: System.ComponentModel.Design.Serialization
Assembly: System (in System.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0