Warappa.Microsoft.Extensions.DependencyInjection.ServiceCollectionModule 1.0.0

Short Description

Instead of throwing all your service-registrations into Startup.cs, group related service-registrations in separate files for readability and clarity by using a familiar syntax.

Define Service-Collection-Module

// derive new module from IServiceCollectionModule
public class IdentityServiceCollectionModule : IServiceCollectionModule
{
    private readonly IConfiguration configuration;

    // optional: like in Startup.cs provide your static dependencies, i.e. the configuration object
    public IdentityServiceCollectionModule(IConfiguration configuration)
    {
        this.configuration = configuration;
    }

    // like in Startup.cs the ConfigureServices method configures the provided service-collection
    public void ConfigureServices(IServiceCollection services)
    {
        // register your services that belong together, i.e. Microsoft.AspNetCore.Identity
        services.AddDbContext<ApplicationDbContext>(options =>
        {
            options.UseSqlServer(configuration.GetConnectionString("Default"));
        });
        services.AddIdentity<ApplicationUser, IdentityRole>(options => options.SignIn.RequireConfirmedAccount = true)
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();
    }
}

Usage in Startup.cs

public class Startup
{
    private readonly IConfiguration configuration;

    public Startup(IConfiguration configuration)
    {
        this.configuration = configuration ?? throw new ArgumentNullException(nameof(configuration));
    }

    public void ConfigureServices(IServiceCollection services)
    {
        ...
        // add grouped dependency-registrations aka. "modules" to service-collection by calling AddModules
        services.AddModules(
            new MigrationServiceCollectionModule(configuration),
            new HealthServiceCollectionModule(),
            new IdentityServiceCollectionModule(configuration),
            new AuthenticationServiceCollectionModule(configuration),
            new AuthorizationServiceCollectionModule()
            );
        ...
    }
}