using System;
using System.Collections;
class MainClass {
public static void Main() {
SortedList sl = new SortedList();
sl.Add("a", "A");
sl.Add("b", "B");
sl.Add("c", "C");
sl.Add("d", "D");
// Get a collection of the keys.
ICollection c = sl.Keys;
// Display list using integer indexes.
Console.WriteLine("Contents by integer indexes.");
for(int i=0; i Console.WriteLine(sl.GetByIndex(i));
}
}