using System;
using System.Collections;
class HashtableDemo {
public static void Main() {
Hashtable ht = new Hashtable();
ht.Add("a", "A");
ht.Add("b", "B");
ht.Add("c", "C");
ht.Add("e", "E");
// Get a collection of the keys.
ICollection c = ht.Keys;
foreach(string str in c)
Console.WriteLine(str + ": " + ht[str]);
}
}
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