/// <summary>
/// Checks if the rotor needs to be advanced
/// </summary>
/// <param name="r">the previous rotor</param>
/// <returns></returns>
private bool CheckToAdvance(Rotor r)
{
// stores the list of values that rotate the rotor
List <char> values = RotorInformation.RotateValues(r.RotorIndex());
// if the list contains the previous letter, return true
if (values.Contains(r.LetterInAlpha(25)))
{
return(true);
}
// does not need to be rotated
return(false);
}