public IEnumerable <IList <Arrangement> > GetUniqueArrangements()
{
var uniquePath = Path.Combine(_workingDirectory, "UnorderedArrangements.txt");
if (File.Exists(uniquePath))
{
return(File.ReadAllLines(uniquePath).Select(a => Arrangement.MultipleFromString(a).ToList()));
}
var allLines = Create();
var distinct = allLines.Select(a => a.Substring(HandLength)).Distinct().OrderBy(x => x).ToList();
File.WriteAllLines(uniquePath, distinct);
return(distinct.Select(a => Arrangement.MultipleFromString(a).ToList()));
}
