using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Row row1 = new Row()

        {

            Date = 20160101,

            Channel = "Facebook",

            Metric = "Investment"

        };

        Row row2 = new Row()

        {

            Date = 20160102,

            Channel = "Google",

            Metric = "Investment"

        };

        Row row3 = new Row()

        {

            Date = 20160103,

            Channel = "Yahoo",

            Metric = "Investment"

        };

        Dictionary<int, Row> rowDictionary = new Dictionary<int, Row>();

        rowDictionary.Add(row1.Date, row1);

        rowDictionary.Add(row2.Date, row2);

        rowDictionary.Add(row3.Date, row3);

        Row radek = rowDictionary[20160101];

        Console.WriteLine("Datum = {0}, Channel = {1}, Metric = {2}", radek.Date, radek.Channel, radek.Metric);

        foreach(KeyValuePair<int, Row> rowKeyValuePair in rowDictionary)

        {

            Console.WriteLine("Date = {0}", rowKeyValuePair.Key);

            Row roow = rowKeyValuePair.Value;

            Console.WriteLine("Datum = {0}, Channel = {1}, Metric = {2}", rowKeyValuePair.Key, roow.Channel, roow.Metric); 

        }

        var current_dat = new Dictionary<string, Dictionary<string, double>>

    {

         { "Facebook", new Dictionary<string, double> { { "Investment", 155000 }, { "Impressions", 9630000 } } },

         { "Google", new Dictionary<string, double> { { "Investment", 300000 }, { "Impressions", 85000 } } },

         { "Zbozi", new Dictionary<string, double> { { "Investment", 12000 }, { "Impressions", 60000 } } }

    };

        foreach(string key in current_dat.Keys)

        {

            Console.WriteLine(key);

        }

        foreach(KeyValuePair<string, Dictionary<string, double>> pair in current_dat)

        {

            Console.WriteLine(pair);

        }

​

    }

    public class Row

    {

        public int Date {get; set;}

        public string Channel {get; set;}

        public string Metric {get; set;}

    }

}