// Test Hashtable class.
public static void Main()
{
    Hashtable ht = new Hashtable();

    ht.Add("gsdf", 5);
    ht.Add("sefd", "dog");
    ht.Add("usqs", 'X');
    ht.Add("odic", 43.54);
    ht.Add("mcnx", true);

    Console.WriteLine(ht["gsdf"]);
    Console.WriteLine(ht["sefd"]);
    Console.WriteLine(ht["usqs"]);
    Console.WriteLine(ht["odic"]);
    Console.WriteLine(ht["mcnx"]);

    Console.WriteLine();
    Console.WriteLine(ht["abcd"]);
    Console.WriteLine(ht["abcd"] == null);
    Console.WriteLine(ht.Count);

    Console.ReadLine();
}