public void RemoveRaceDiscipline(RaceDiscipline raceDiscipline)
 {
     if (raceDiscipline != null)
     {
         foreach (RaceDiscipline rd in RaceDisciplines)
         {
             if (rd == raceDiscipline)
             {
                 RaceDisciplines.Remove(rd);
                 return;
             }
         }
     }
 }
 public void AddRaceDiscipline(RaceDiscipline raceDiscipline)
 {
     if (raceDiscipline != null)
     {
         foreach (RaceDiscipline rd in RaceDisciplines)
         {
             if (rd.Name == raceDiscipline.Name)
             {
                 return;
             }
         }
         RaceDisciplines.Add(raceDiscipline);
     }
 }