public List <Footballer> ListAll()
{
return(List_footballers.OrderBy(a => a.Name).ToList());
}
public List <Footballer> ListOverThirty()
{
return(List_footballers.Where(f => f.Age > 30)
.OrderByDescending(f => f.Level).ToList());
}
public void AddFootballer(Footballer f)
{
List_footballers.Add(f);
Team_level += f.Level * Team_coach.Level;
}