public bool RegisterSportsman(Sportsman sportsman)
{
if (Sportsmen.Contains(sportsman))
{
return(false);
}
Sportsmen.Add(sportsman);
return(true);
}
public bool RemoveSportsman(Sportsman sportsman)
{
if (Sportsmen.Contains(sportsman))
{
if (Medals.Any(m => m.Sportsman == sportsman))
{
throw new Exception($"{sportsman} can not be removed because he/she has involved in a competition");
}
else
{
Sportsmen.Remove(sportsman);
return(true);
}
}
return(false);
}
