public Puppy Add(Puppy puppy) { if (puppy == null) { throw new ArgumentNullException("puppy"); return(null); } puppy.Id = _nextId++; //puppy.Id = Guid.NewGuid().ToString(); _puppy[puppy.Id] = puppy; return(puppy); }
public void Update(Puppy puppy) { _puppy[puppy.Id] = puppy; }