Combine Service Collection 60 Or Later - Aspnetcore

Consider the following which registers services and configures options:

csharp

using ConfigSample.Options;
using Microsoft.Extensions.DependencyInjection.ConfigSample.Options;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddRazorPages();

builder.Services.Configure<PositionOptions>(
    builder.Configuration.GetSection(PositionOptions.Position));
builder.Services.Configure<ColorOptions>(
    builder.Configuration.GetSection(ColorOptions.Color));

builder.Services.AddScoped<IMyDependency, MyDependency>();
builder.Services.AddScoped<IMyDependency2, MyDependency2>();

var app = builder.Build();

Related groups of registrations can be moved to an extension method to register services. For example, the configuration services are added to the following class:

csharp

using ConfigSample.Options;
using Microsoft.Extensions.Configuration;

namespace Microsoft.Extensions.DependencyInjection
{
    public static class MyConfigServiceCollectionExtensions
    {
        public static IServiceCollection AddConfig(
             this IServiceCollection services, IConfiguration config)
        {
            services.Configure<PositionOptions>(
                config.GetSection(PositionOptions.Position));
            services.Configure<ColorOptions>(
                config.GetSection(ColorOptions.Color));

            return services;
        }

        public static IServiceCollection AddMyDependencyGroup(
             this IServiceCollection services)
        {
            services.AddScoped<IMyDependency, MyDependency>();
            services.AddScoped<IMyDependency2, MyDependency2>();

            return services;
        }
    }
}

The remaining services are registered in a similar class. The following code uses the new extension methods to register the services:

csharp

using Microsoft.Extensions.DependencyInjection.ConfigSample.Options;

var builder = WebApplication.CreateBuilder(args);

builder.Services
    .AddConfig(builder.Configuration)
    .AddMyDependencyGroup();

builder.Services.AddRazorPages();

var app = builder.Build();

Note: Each services.Add{GROUP_NAME} extension method adds and potentially configures services. For example, xref:Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddControllersWithViews%2A adds the services MVC controllers with views require, and xref:Microsoft.Extensions.DependencyInjection.MvcServiceCollectionExtensions.AddRazorPages%2A adds the services Razor Pages requires.