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using System;
using System.Linq;
using System.Collections.Generic;
public class Program
{
public static void Main()
var cities = new Dictionary<string, string>(){
{"UK", "London, Manchester, Birmingham"},
{"USA", "Chicago, New York, Washington"},
{"India", "Mumbai, New Delhi, Pune"}
};
cities["UK"] = "Liverpool, Bristol"; // update value of UK key
cities["USA"] = "Los Angeles, Boston"; // update value of USA key
//cities["France"] = "Paris"; //throws run-time exception: KeyNotFoundException
if(cities.ContainsKey("France")){
cities["France"] = "Paris";
}
foreach(var kvp in cities)
Console.WriteLine("Key: {0}, Value:{1}", kvp.Key, kvp.Value);