Using C#:

1- get oldest person:

using System; using System.Collections.Generic; class Program { static void Main() { // Shows a List of KeyValuePairs. var list = new List>(); list.Add(new KeyValuePair("Sara", 10)); list.Add(new KeyValuePair("Jack", 20)); list.Add(new KeyValuePair("Mac", 40)); // Do somthing to get oldest value. // Ex. Output: the oldest person is Mac. } }