startup.cs大概是这么实现的.

用抽象类或者接口,来激活符合该定义的对象类型进行实例化.

using System.Reflection;

// See https://aka.ms/new-console-template for more information

using System;

namespace MyApp // Note: actual namespace depends on the project name.

{

public class Program

{

static void Main(string[] args)

{

// Console.WriteLine("Hello World!");

Console.WriteLine("Hello, World!");

//Apps z = new Apps();

var tlist = Assembly.GetAssembly(typeof(Apps)).GetTypes()

.Where(t => t.IsClass && !t.IsInterface && t.GetInterfaces().Contains((typeof(iApps)))).ToList();

foreach (var o in tlist)

{

iApps m = (iApps)Activator.CreateInstance(o, false);

//m.Gocode();

m.GetCode();

}

}

}

}

interface iApps

{

public void GetCode();

}

public abstract class Apps

{

protected Apps()

{

}

public abstract void Gocode();

// {

// Console.WriteLine("gocode");

// }

public void Init()

{

Gocode();

}

}

public class App1 : Apps,iApps

{

public void GetCode()

{

System.Console.WriteLine("app1 getcode");

// throw new NotImplementedException();

}

public override void Gocode() =>

//throw new NotImplementedException();

Console.WriteLine("app1");

}

public class App2 : Apps,iApps

{

public void GetCode()

{

System.Console.WriteLine("app2 getcode");

// throw new NotImplementedException();

}

public override void Gocode()

{

System.Console.WriteLine("app2");

// throw new NotImplementedException();

}

}

public class App3 : Apps,iApps

{

public void GetCode()

{

System.Console.WriteLine("app3 getcode");

// throw new NotImplementedException();

}

public override void Gocode()

{

System.Console.WriteLine("App3");

// throw new NotImplementedException();

}

}