public void SpeakTo(Elephant whoToTalkTo, string message)
 {
     whoToTalkTo.HearMessage(message, this);
 }
 public void HearMessage(string message, Elephant whoSaidIt)
 {
     Console.WriteLine(Name + " Heard a message ");
     Console.WriteLine(whoSaidIt.Name + " said this: " + message);
 }