/// <summary>
/// Print out all contents of the linked list.
/// </summary>
/// <returns></returns>
public override string ToString()
{
return(_root?.ToString() ?? string.Empty);
}
/// <summary>
/// Print out all contents of the linked list.
/// </summary>
/// <returns></returns>
public override string ToString()
{
return(_root?.ToString() ?? string.Empty);
}