DI依赖注入

using Autofac;

public interface IService
{
    void DoSomething();
}

public class Service : IService
{
    public void DoSomething()
    {
        Console.WriteLine("Doing something...");
    }
}

// 注册服务
var builder = new ContainerBuilder();
builder.RegisterType<Service>().As<IService>();
var container = builder.Build();

// 解析依赖
var service = container.Resolve<IService>();

// 使用服务
service.DoSomething();

using Microsoft.Practices.Unity;

public interface IService
{
    void DoSomething();
}

public class Service : IService
{
    public void DoSomething()
    {
        Console.WriteLine("Doing something...");
    }
}

// 注册服务
var container = new UnityContainer();
container.RegisterType<IService, Service>();

// 解析依赖
var service = container.Resolve<IService>();

// 使用服务
service.DoSomething();

using Ninject;

public interface IService
{
    void DoSomething();
}

public class Service : IService
{
    public void DoSomething()
    {
        Console.WriteLine("Doing something...");
    }
}

// 注册服务
var kernel = new StandardKernel();
kernel.Bind<IService>().To<Service>();

// 解析依赖
var service = kernel.Get<IService>();

// 使用服务
service.DoSomething();

using SimpleInjector;

public interface IService
{
    void DoSomething();
}

public class Service : IService
{
    public void DoSomething()
    {
        Console.WriteLine("Doing something...");
    }
}

// 注册服务
var container = new Container();
container.Register<IService, Service>();

// 解析依赖
var service = container.GetInstance<IService>();

// 使用服务
service.DoSomething();

using Microsoft.Extensions.DependencyInjection;
using System;

public interface IService
{
    void DoSomething();
}

public class Service : IService
{
    public void DoSomething()
    {
        Console.WriteLine("Doing something...");
    }
}

class Program
{
    static void Main(string[] args)
    {
        // 创建服务集合
        var services = new ServiceCollection();

        // 注册服务
        services.AddTransient<IService, Service>();

        // 构建服务提供程序
        var serviceProvider = services.BuildServiceProvider();

        // 解析依赖
        var service = serviceProvider.GetRequiredService<IService>();

        // 使用服务
        service.DoSomething();
    }
}