using System;
using System.Collections.Generic;
using System.Collections;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, Dictionary<string, int>> hash2 = new Dictionary<string,Dictionary<string,int>>();
            hash2.Add("A", new Dictionary<string, int>());
            hash2["A"].Add("A", 1);
            hash2["A"].Add("B", 2);
            hash2.Add("B", new Dictionary<string, int>());
            hash2["B"].Add("A", 4);
            hash2["B"].Add("B", 8);

            foreach (string k in hash2["B"].Keys)
            {
                Console.WriteLine(k + " - " + hash2["B"][k]);
            }
        }
    }
}