MVVM IoC Registration across Projects

[Pinox]

Hi Guys, @Sergio0694 , @michael-hawker

In MvvmLight I can easily register a class in any of my projects, therefor I do not have a specific entry point to register a class.

SimpleIoc.Default.Register();

In the Toolkit.Mvvm I have a specific entry point.

Ioc.Default.ConfigureServices(
new ServiceCollection()
.AddSingleton()
.BuildServiceProvider());

Question 1
How can I reuse the existing ServerCollection in a different project and add more items (for registration) to it without resorting to constructor injection etc.

I'm looking for something like :

Ioc.Default.ExistingService(
.AddSingleton()
.ReBuildServiceProvider());

I ended up changing my code base to instantiate Ioc.Default.ConfigureServices() from the root app so I got everything working again, but this was a nice feature of MvvmLight where you can add more services from any project.

Question 2
With most templates in .NET starting to embrace the default asp.net core HostBuilder.

Is there plans to integrate toolkit.mvvm with the generic hostbuilder ?

example:
var host = new HostBuilder()
.ConfigureServices((c, x) =>
//Add this line to call back into your native code
AddToolkitMvvm(c, x);
})
.Build();

Where we can add the toolkit.mvvm to the generic host builder but still access the instances through the convenient
Ioc.Default.GetServices that is cross project instead of the default hostbuilder ServiceProvider.GetService();