Using IOptions with Unity

Question

I have a Class Library that is referenced from a ASP.Net Core (targeting 4.5) and a 4.5 web app and I want to have shared App Settings. I am using Unity for DI on the 4.5 side, and Core Bootstrapping on the Core side. On the Core side, I register a type of my App Settings like so

services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));

I then reference AppSettings like so

private readonly AppSettings _appSettings;
public SubmissionRepository(PricingContext dbContext, IMapper mapper, IOptions<AppSettings> appSettings)
{
     _appSettings = appSettings;
}

I want to register my services on the 4.5 side, I was able to do this in WebApiConfig.cs with Unity

container.RegisterType<AppSettings>(new InjectionFactory(o => BuildAppSettings()));

where BuildAppSettings just populates an instance of that type using ConfigurationManager (not sure if this is the right way to do it)

However I get an Exception at Runtime

Unable to cast object of type '.Core.Integration.Models.AppSettings' to type 'Microsoft.Extensions.Options.IOptions`1[Core.Integration.Models.AppSettings]'.

I am guessing I need to somehow put IOptions instance into my container, but not sure how to do this. Is there a preferred/better way to do this?

Answer 1

If I would have Googled for 10 more seconds, I would have found this

Options.Create(new AppSettings{
    // config reads
});