using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

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

            dict_inner.Add("inner1", "inner_val1");

            dict_inner.Add("inner2", "inner_val2");

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

            dict_inner.Add("inner11", "inner_val1");

            dict_inner.Add("inner21", "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); 

        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("-------------");

            var intendedResult = dict_outer.Where(k => k.Value.Any(ik => ik.Key == "inner1")).ToDictionary(d => d.Key, d => d.Value);

​

foreach(var res in intendedResult)

{

    Console.WriteLine(res.Key);

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

    foreach(var res2 in i)

{

        Console.WriteLine(res2.Key);

Console.WriteLine(res2.Value);

    }

}

    }

}