private string GetUniqueTimeStamp(List <string> Timestamps) { ulong seconds = Kicad_utils.Utils.GetUnixSeconds(DateTime.Now); string tstamp = seconds.ToString("X"); if (Timestamps == null) { Timestamps = new List <string>(); } else { while (Timestamps.IndexOf(tstamp) != -1) { seconds++; tstamp = seconds.ToString("X"); } } Timestamps.Add(tstamp); return(tstamp); }