/// <summary>
/// Adds the book.
/// </summary>
/// <param name="book">The book.</param>
/// <exception cref="ArgumentNullException">book</exception>
/// <exception cref="ArgumentException">book</exception>
public void AddBook(Book book)
{
if (ReferenceEquals(book, null))
{
Logger.Error($"{nameof(book)} is null");
throw new ArgumentNullException($"{nameof(book)} is null");
}
if (BookList.Contains(book))
{
Logger.Error($"{nameof(book)} is already exist!");
throw new ArgumentException($"{nameof(book)} is already exist!");
}
BookList.Add(book);
Logger.Info($"{nameof(book)} added!");
}