using System.Collections.Generic;
public static void Main()
IDictionary<int, string> numberNames = new Dictionary<int, string>();
numberNames.Add(1,"One");
numberNames.Add(3,"Three");
numberNames.Add(2,"Two");
foreach(KeyValuePair<int, string> kvp in numberNames)
Console.WriteLine("Key: {0}, Value: {1}",kvp.Key, kvp.Value);
var cities = new Dictionary<string, string>(){
{"UK","London, Manchester, Birmingham"},
{"USA","Chicago, New York, Washington"},
{"India","Mumbai, New Delhi, Pune"},
Console.WriteLine(cities["UK"]);
Console.WriteLine(cities["USA"]);
if(cities.ContainsKey("France")){
Console.WriteLine(cities["France"]);
if(cities.TryGetValue("France", out result))
Console.WriteLine(result);
Console.WriteLine("---access elemts using for loop---");
for (int i = 0; i < cities.Count; i++)
Console.WriteLine("Key: {0},Value: {1}",
cities.ElementAt(i).Value);
foreach(var kvp in cities)
Console.WriteLine("Key: {0}, Value: {1}", kvp.Key,kvp.Value);