public static void Main()
{
BiDictionary <string, int, int> biDictionary = new BiDictionary <string, int, int>();
biDictionary.Add("One", 2, 3);
var stringKeysValues = biDictionary.FindFirstKey("One");
foreach (var pair in stringKeysValues)
{
Console.WriteLine(pair);
}
var intKeysValues = biDictionary.FindSecondKey(2);
foreach (var pair in intKeysValues)
{
Console.WriteLine(pair);
}
}