public Folder(string directoryName)
{
if (string.IsNullOrWhiteSpace(directoryName))
{
throw new ArgumentNullException(nameof(directoryName));
}
DirectoryName = directoryName.Trim();
string[] nameParts = DirectoryName.Split(Separator.Sequence);
VirtualName = nameParts[nameParts.Length - 1].Trim();
if (nameParts.Length > 1 && Int32.TryParse(nameParts[0], out int sequenceNumber))
{
SequenceNumber = sequenceNumber;
}
}
