Hi!

When i build the service provider with validation of scopes like this:
services.BuildServiceProvider(validateScopes: true)

I get this error:
Cannot resolve scoped service 'FubarDev.FtpServer.Commands.IFtpCommandHandlerProvider' from root provider.

ValidateScopes is also true when using CreateDefaultBuilder in ASP.NET Core which is where i encountered the issue.

Here is a minimal example of the issue, if i remove validateScopes i can connect but with it the application crashes.

Great work with 3.0, looking foward to the release!

/Ludvig