private string DistinctSupervisor(string supervisor, List<string> ListSupervisor)
{
if (supervisor.IndexOf(",") != -1)
{
ListSupervisor.Add(supervisor.Substring(0, supervisor.IndexOf(",")));
return DistinctSupervisor(supervisor.Substring(supervisor.IndexOf(",") + 1), ListSupervisor);
}
else
{
ListSupervisor.Add(supervisor);
return supervisor;
}
}