IOC 生命周期和释放

使用ServiceCollection 注入AddTransient，AddScoped，AddSingleton  三不同生命周期的的对象

Transient 最先释放

Scope 随后 

Singleton  最后

using (var sc = new ServiceCollection()
    .AddScoped<IA, A>()
    .AddSingleton<IB, B>()
    .AddTransient<IC, C>()
    .BuildServiceProvider()

    )
{

    //var Obja = sc.GetService<IA>()!;
    //var Objb = sc.GetService<IB>()!;
    //var Objc = sc.GetService<IC>()!;
    //sc.AddScoped<IA, A>();
    //sc.AddSingleton<IB, B>();
    //sc.AddTransient<IC, C>();
    using (var cs = sc.CreateScope()) //创建服务)
{
        
     var sp=   cs.ServiceProvider;
    //  A Obja = (A)sp.GetService<IA>()!;
    var ChildObja = sp.GetService<IA>()!;
    var ChildObjb = sp.GetService<IB>()!;
    var ChildObjc = sp.GetService<IC>()!;
   // Obja.run();
    Console.WriteLine();
}
}
public class Base : IDisposable
{
    public Base() => Console.WriteLine($" 对象已 {GetType().Name} 创建");
    public void Dispose() => Console.WriteLine($" 对象已 {GetType().Name} 释放.");
}

public interface IA { }
public interface IB { }
public interface IC { }

public class A: Base,IA, IDisposable
{
    public void run() => Console.Write($"{GetType().Name} 运行啦");
}

public class B: Base,IB, IDisposable { }
public class C : Base, IC, IDisposable { }