serviceProvider.GetService DbContext in console app

Hi,

I am trying to use DI with a console app.  The Identity migrations work fine.  However, serviceProvider.GetService for my own DbContext does ever call OnModelCreating, to add the DbSets to the DbContext.  When I try to access one of the DbSets defined in ResolveROIContext, the code branch simple returns.  If I trace the code, it never hits OnModelCreating.

public class Startup
{
    public static IConfigurationRoot Configuration { get; set; }

    public static void ConfigureServices(IServiceCollection services)
    {
        services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
        services.AddDbContext<ResolveROIContext>(options =>
            options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
        services.AddIdentity<ApplicationUser, ApplicationRole>()
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();
    }

    public static void Main(string[] args)
    {
        var services = new ServiceCollection();
        var builder = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json");

        Configuration = builder.Build();
        ConfigureServices(services);
        var provider = services.BuildServiceProvider();

        Task task = Task.Run(async () =>
        {
            await InitializeData.Initialize(provider);
        });
    }
}

public class InitializeData
    {
        public static async Task<bool> Initialize(IServiceProvider serviceProvider)
        {
            var context = serviceProvider.GetService(typeof(ApplicationDbContext)) as ApplicationDbContext;

            context.Database.Migrate();

            await SeedUsers(serviceProvider);

            return true;
        }

        public static async Task<bool> SeedUsers(IServiceProvider serviceProvider)
        {
            // Get Identity DbContext from Dependency Injection.
            var xIdentity = serviceProvider.GetService(typeof(ApplicationDbContext)) as ApplicationDbContext;
            // Get Identity UserManager from Dependency Injection.
            var userManager = serviceProvider.GetService(typeof(UserManager<ApplicationUser>)) as UserManager<ApplicationUser>;
            // Get Identity RolerManager from Dependency Injection.
            var roleManager = serviceProvider.GetService(typeof(RoleManager<ApplicationRole>)) as RoleManager<ApplicationRole>;
            var xResolve = serviceProvider.GetService(typeof(ResolveROIContext)) as ResolveROIContext;

Thanks,

David