static void Main()
{
var collection = new BiDictionary<string, string, string>();
collection.Add("game", "action", "GTA V");
collection.Add("game", "rpg", "Pillars of Eternity");
collection.Add("game", "fps", "Chivalry");
collection.Add("movie", "action", "Terminator");
collection.Add("game", "rpg", "Wasteland");
collection.Add("game", "rpg", "Divinity: Original Sin");
collection.Add("movie", "comedy", "The Big Lebowski");
collection.Add("movie", "action", "Kill Those Damned American Bastards");
collection.Add("movie", "comedy", "IT Crowd");
collection.Add("movie", "fps", "Doom the movie");
collection.Add("book", "comedy", "50 shades of Red");
collection.Add("book", "comedy", "100 shades of Red");
collection.Add("book", "comedy", "2500 shades of Gayness");
var comedies = collection.FindElementsByKey2("comedy");
Console.Write("Comedies: ");
PrintCollection(comedies);
var rpgs = collection.FindElementsByKey2("rpg");
Console.Write("RPGs: ");
PrintCollection(rpgs);
var games = collection.FindElementsByKey1("game");
Console.Write("Games: ");
PrintCollection(games);
var movies = collection.FindElementsByKey1("movie");
Console.Write("Movies: ");
PrintCollection(movies);
var musicRecords = collection.FindElementsByKey1("music records");
Console.Write("Music records: ");
PrintCollection(musicRecords);
var comedyBooks = collection.FindElementsByKey1AndKey2("book", "comedy");
Console.WriteLine("Comedy Books: ");
PrintCollection(comedyBooks);
}
