static void Entities()
{
EntityCollection collection = new EntityCollection();
collection.Add(new Person("Lex Luthor"));
collection.Add(new Hero("Batman"));
collection.Add(new Hero("Superman"));
collection.Add(new Hero("Flash"));
collection.Add(new Person("Linda Park-West"));
IEntityIterator iterator = collection.CreateIterator();
var entity = iterator.First();
while (!iterator.IsDone)
{
Console.WriteLine(entity.Name);
entity = iterator.Next();
}
}