//--- C'tor
public ConcreteIterator(ConcreteAggregate aggregate)
{
this.aggregate = aggregate;
}
public void UsageMethod()
{
ConcreteAggregate a = new ConcreteAggregate();
a[0] = "Item A";
a[1] = "Item B";
a[2] = "Item C";
a[3] = "Item D";
ConcreteIterator i = new ConcreteIterator(a);
System.Diagnostics.Debug.WriteLine("Iterating over collection:");
string item = i.First();
while (item != null)
{
System.Diagnostics.Debug.WriteLine(item);
item = i.Next();
}
}