DependencyResolver

DependencyResolver.cs

public class DependencyResolver
{
    public IServiceProvider ServiceProvider { get; }
    public string CurrentDirectory { get; set; }

    public DependencyResolver()
    {
        // Set up Dependency Injection
        IServiceCollection services = new ServiceCollection();
        ConfigureServices(services);
        ServiceProvider = services.BuildServiceProvider();
    }

    private void ConfigureServices(IServiceCollection services)
    {
        // Register env and config services
        services.AddTransient<IEnvironmentService, EnvironmentService>();
        services.AddTransient<IConfigurationService, ConfigurationService>
            (provider => new ConfigurationService(provider.GetService<IEnvironmentService>())
            {
                CurrentDirectory = CurrentDirectory
            });

        // Register DbContext class
        services.AddTransient(provider =>
        {
            var configService = provider.GetService<IConfigurationService>();
            var connectionString = configService.GetConfiguration().GetConnectionString(nameof(ProductsDbContext));
            var optionsBuilder = new DbContextOptionsBuilder<ProductsDbContext>();
            optionsBuilder.UseSqlServer(connectionString, builder => builder.MigrationsAssembly("EfDesignDemo.EF.Design"));
            return new ProductsDbContext(optionsBuilder.Options);
        });
    }
}