C# in a Nutshell

Name

ExtensibleClassFactory

Synopsis

This class exposes the method RegisterObjectCreationCallback(), which specifies a delegate that manufactures instances of a managed type. Use this to build managed types that extend unmanaged types. Since a managed type cannot directly inherit from an unmanaged type, the managed type needs to aggregate an instance of the unmanaged type. The delegate that you register with RegisterObjectCreationCallback() takes care of creating the unmanaged type.

public sealed class ExtensibleClassFactory {
// Public Static Methods
   public static method void RegisterObjectCreationCallback(
        ObjectCreationDelegate callback);  
}