How to Demonstrate iDictionary Interface in CSharp Program

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        Dictionary<string, string> dict = new Dictionary<string, string>();
        dict["Tom"] = "Sunil";
        WriteKeyA(dict);
        SortedDictionary<string, string> sort = new SortedDictionary<string, string>();
        sort["Tom"] = "Malviya";
        WriteKeyA(sort);
        Console.ReadLine();
    }

    static void WriteKeyA(IDictionary<string, string> i)
    {

        Console.WriteLine(i["Tom"]);
    }
}
---------------------------------
OUTPUT:
Sunil
Malviya
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