public UserGroup Add(UserGroup entity)
{
var newEntity = (UserGroup)entity.Clone();
newEntity.Id = !entities.Any() ? 1 : entities.Max(item => item.Id) + 1;
entities.Add(newEntity);
return (UserGroup)newEntity.Clone();
}
public UserGroup Update(UserGroup entity)
{
var existEntity = entities.SingleOrDefault(item => item.Id == item.Id);
if (existEntity == null)
{
throw new NullReferenceException();
}
existEntity.Name = entity.Name;
return (UserGroup)existEntity.Clone();
}
