using System;

using System.Collections.Generic;

​

using System.IO;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        Dictionary<int, string> a = new Dictionary<int, string>();

        a[1] = "test";

        Console.WriteLine(a[1]);

        Dictionary<int, Object> b = new Dictionary<int, Object>();

        b[0] = 3;

        Console.WriteLine(b[0]);

        Dictionary<string, Object> c = new Dictionary<string, Object>();

        c["date test"] = DateTime.UtcNow;

        Console.WriteLine(c["date test"]);

        Dictionary<string, List<int>> d = new Dictionary<string, List<int>>();

        //d["list test"].Add(1); // wont work

        d["list test"] = new List<int>();

        d["list test"].Add(1);

        Console.WriteLine(d["list test"]);

    }

}