Assemblies containing types participating in the composition process can customize the current application ViewModelCompositionOptions by defining a type that implements the IViewModelCompositionOptionsCustomization interface. At runtime, when the application starts, types implementing the IViewModelCompositionOptionsCustomization will be instantiated and the Customize method will be invoked.
Note
Types implementing IViewModelCompositionOptionsCustomization are not managed by IoC container. Dependency injection is not available.
ViewModelCompositionOptions offers the ability to access the application IConfiguration instance. By default, the ViewModelCompositionOptions.Configuration property is null. If accessed it throws an ArgumentException. To enable configuration support, pass the IConfiguration instance when configuring ServiceComposer via the AddViewModelComposition extension method.