using System;

public class Program

{

    public static void Main()

    {

        //Specific1 s1 = new Specific1("some");

        //s1.classT = new B();

        //s1.classT.id = 5;

        Action<string> some;

        void ActionLocal(string s){Console.WriteLine("{0}", s);};

        void ActionLocal2(int i, string s){Console.WriteLine("{0}, {1}", i, s);};

        some = s => ActionLocal2(5, s);

        some.Invoke("Test");

    }

    public class A{

        public int id;

    }

    public class B : A{

        public string name;

    }

    public class C : A{

        public float ratio;

    }

    public class Container<T, U>{

    }

    public class Common<T, U> : Container<T, U> where T : A, new(){

        public T classT;

        public Common(U val){

            classT = new T();

        }

        public bool AreSame(T a, T b){

            return a.id == b.id;

        }

    }

    public class Specific1 : Common<B, string>{

        public Specific1(string s) : base (s){

        }

        public int GetID(){

            return classT.id;

        }

    }

​

}

​