using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

         Dictionary<string, string> dict_inner = new Dictionary<string, string>();

            dict_inner.Add("new1", "inner_val1");

            dict_inner.Add("new2", "inner_val2");

         Dictionary<string, string> dict_inner2 = new Dictionary<string, string>();

            dict_inner2.Add("halo1", "inner_val1");

            dict_inner2.Add("halo2", "inner_val2");

​

            Dictionary<string, Dictionary<string, string>> dict_outer = new Dictionary<string, Dictionary<string, string>>();

            dict_outer.Add("outer1", dict_inner); 

           dict_outer.Add("outer2", dict_inner2); 

        Console.WriteLine("Directly get all inner object \n");

        var result2 = dict_outer.SelectMany(x => x.Value).ToDictionary(x => x.Key,  x => x.Value);

        foreach(var res2 in result2)

{

            Console.WriteLine(res2.Key);

            Console.WriteLine(res2.Value);

            Console.WriteLine("\n");

        }

        Console.WriteLine("multiple outer object  \n");

            var intendedResult = dict_outer.ToDictionary(d => d.Key, d => d.Value);

​

foreach(var res in intendedResult)

{

    var i = res.Value.ToDictionary(d => d.Key, d => d.Value);

    var count = res.Value.Count();

    Console.WriteLine("outer key:" + res.Key + "(" + count + ")");

    Console.WriteLine("-------------");

    foreach(var res2 in i)

{

        Console.WriteLine(res2.Key);

Console.WriteLine(res2.Value);

            Console.WriteLine("\n");

    }

        Console.WriteLine("--------");

}

    }

}