public bool AddManifestation(Manifestation newManif)
{
if (FindManifestation(newManif.Id) != null)
{
return(false);
}
Manifestations.Add(newManif);
SaveData();
return(true);
}
public bool DeleteManifestation(string id)
{
Manifestation target = FindManifestation(id);
if (target == null)
{
return(false);
}
Manifestations.Remove(target);
SaveData();
return(true);
}