IList trouble. Fixed size?
IList<string> stelle = stelleString.Split('-');

if (stelle.Contains("3"))
    stelle.Add("8");

if (stelle.Contains("4"))
    stelle.Add("6");

IList<string> stelle = stelleString.Split('-').ToList();

IList<string> stelle = new List<string>(stelleString.Split('-'));

string[] stelle = stelleString.Split('-');

List<string> stelle = stelleString.Split('-').ToList();

IList<string> stelle = new List<string>(stelleString.Split('-'));

IList<string> stelle = stelleString.Split('-').ToList();

IList<string> stelle = stelleString.Split('-').ToList();

ReDim perserve myarray(newlength minus one)