public void Update(DbAuthor author)
{
var dbbook = Get(author.Id);
dbbook.FirstName = author.FirstName;
dbbook.LastName = author.LastName;
}
public int Create(DbAuthor author)
{
var newId = _authors.Any() ? (_authors.Max(x => x.Id) + 1) : 1;
author.Id = newId;
_authors.Add(author);
return(newId);
}