CODE EXAMPLE FOR CSHARP

iserviceprovider vs iservicecollection

public static class ServiceProviderFactory
{
    public static IServiceProvider ServiceProvider { get; }

    static ServiceProviderFactory()
    {
        HostingEnvironment env = new HostingEnvironment();
        env.ContentRootPath = Directory.GetCurrentDirectory();
        env.EnvironmentName = "Development";

        Startup startup = new Startup(env);
        ServiceCollection sc = new ServiceCollection();
        startup.ConfigureServices(sc);
        ServiceProvider = sc.BuildServiceProvider();
    }
}