public void MemberCurrentRented()
{
if (LeftNode != null)
{
LeftNode.MemberCurrentRented();
}
//Then we print the root node
Console.WriteLine("Title: {0} Copies Currently Borrowed: {1}", this.Title.PadRight(20), this.NumberOfCopiesRentedByThisUser);
//Then we go to the right node which will print itself as both its children are null
if (RightNode != null)
{
RightNode.MemberCurrentRented();
}
}