using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

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

        myDtStrStr.Add("FirstName", "John");                //Adding string Key and string value to Dictionary myDtStrStr

        myDtStrStr.Add("LastName", "Sydney");

        myDtStrStr.Add("Address", "Sydney");

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

        myDtStrInt.Add("Marks", 88);                        //Adding string Key and int value to Dictionary myDtStrInt

        myDtStrInt.Add("Age", 23);

        myDtStrInt.Add("IdNo", 102123);

        Dictionary<double, string> myDtDblStr = new Dictionary<double, string>();

        myDtDblStr.Add(10.1, "Kumar");                      //Adding Double Key and String value to Dictionary myDtDblStr

        myDtDblStr.Add(10.2, "Kevin");

        myDtDblStr.Add(10.3, "Peter");

    }

}