public void AcceptVisitorExample()
{
var sortedList = new SortedList <string> {
"cat", "dog", "canary"
};
// There should be 3 items in the sortedList.
Assert.AreEqual(3, sortedList.Count);
// Create a visitor that will simply count the items in the sortedList.
var visitor = new CountingVisitor <string>();
// Make sortedList tree call IVisitor<T>.Visit on all items contained.
sortedList.AcceptVisitor(visitor);
// The counting visitor would have visited 3 items.
Assert.AreEqual(3, visitor.Count);
}
