how to get an element of hashtable in c#

//creating a Hashtable using collection-initializer syntax
var cities = new Hashtable(){
	{"UK", "London, Manchester, Birmingham"},
	{"USA", "Chicago, New York, Washington"},
	{"India", "Mumbai, New Delhi, Pune"}
};
    
string citiesOfUK = (string) cities["UK"]; //cast to string
string citiesOfUSA = (string) cities["USA"]; //cast to string

Console.WriteLine(citiesOfUK);
Console.WriteLine(citiesOfUSA);

cities["UK"] = "Liverpool, Bristol"; // update value of UK key
cities["USA"] = "Los Angeles, Boston"; // update value of USA key

if(!cities.ContainsKey("France")){
    cities["France"] = "Paris";
}