Castle.Windsor.Extensions.DependencyInjection - Existing Container is cleared of all registrations

[DamienLaw]

public class Program
{
    public static async Task Main(string[] args)
    {
        var testClass = new TestClass();
        var container = new WindsorContainer();
        container.Register(Component.For<ITestClass>().Instance(testClass));

        await Host.CreateDefaultBuilder(args)
            .UseWindsorContainerServiceProvider(container) // <-- This will cause the container to be cleared as if it was a brand newly instantiated container.
            .RunAsync();
    }
}

This happens right after a subsystem is added to the container

Windsor/src/Castle.Windsor.Extensions.DependencyInjection/WindsorServiceProviderFactoryBase.cs

Lines 61 to 67 in 28e7afa

	protected virtual void AddSubSystemToContainer(IWindsorContainer container)
	{
	container.Kernel.AddSubSystem(
	SubSystemConstants.NamingKey,
	new SubSystems.DependencyInjectionNamingSubsystem()
	);
	}

Is this by design? Is there no way I could use the existing registrations prior to .UseWindsorContainerServiceProvider(container)?

Update:
I just realized in the XML Documentation that all registrations will be cleared. Didn't notice that before.

Windsor/src/Castle.Windsor.Extensions.DependencyInjection/Extensions/HostBuilderExtensions.cs

Lines 59 to 68 in 28e7afa

	/// <summary>
	/// Uses <see name="IWindsorContainer" /> as the DI container for the host
	/// </summary>
	/// <param name="hostBuilder">Host builder</param>
	/// <param name = "container">Windsor Container to be used for registrations, please note, will be cleared of all existing registrations</param>
	/// <returns>Host builder</returns>
	public static IHostBuilder UseWindsorContainerServiceProvider(this IHostBuilder hostBuilder, IWindsorContainer container)
	{
	return hostBuilder.UseServiceProviderFactory<IWindsorContainer>(new WindsorServiceProviderFactory(container));
	}

Is it possible to copy the registrations back over?

[ikkentim]

Maybe this helps: #627 (comment)