using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var d = new Dictionary<int, Func<BaseClass>>(){{1, ()=> new SubClass1()},

                                                       {2, ()=>new SubClass2()}};

        Console.WriteLine(d[1]().Name);

        Console.WriteLine(d[2]().Name);

    }

}

​

public abstract class BaseClass{

    public abstract string Name {get;}

}

public class SubClass1 : BaseClass {

    public override string Name { get{return "SubClass1";}}

}

public class SubClass2 : BaseClass {

    public override string Name { get{return "SubClass2";}}

}