static void Main(string[] args)
{
BiDictionary <string, int, string> bidictionary = new BiDictionary <string, int, string>(true);
bidictionary.Add("Nasko", 4, "PHP");
bidictionary.Add("Joro", 3, "C#");
bidictionary.Add("Petar", 4, "C++");
bidictionary.Add("Raicho", 1, "PERL");
bidictionary.Add("Filip", 4, "Java");
bidictionary.Add("Sasho", 2, "Listy");
Console.WriteLine(string.Join(" ", bidictionary.GetByFirstKey("Joro")));
Console.WriteLine(string.Join(" ", bidictionary.GetBySecondKey(3)));
Console.WriteLine(string.Join(" ", bidictionary.GetByFirstAndSecondKey("Sasho", 2)));
Console.WriteLine(bidictionary.Count);
bidictionary.RemoveByFirstKey("Raicho");
Console.WriteLine(bidictionary.Count);
bidictionary.RemoveBySecondKey(2);
Console.WriteLine(bidictionary.Count);
bidictionary.RemoveByFirstAndSecondKey("Nasko", 4);
}