/// <summary>
/// Override of Equals(object obj) method
/// </summary>
/// <param name="obj"></param>
/// <returns>Equality result</returns>
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
if (ReferenceEquals(obj, this))
{
return(true);
}
Book book = obj as Book;
if (book == null)
{
return(false);
}
if (book.GetHashCode() != this.GetHashCode())
{
return(false);
}
return(book.ISBN == this.ISBN);
}
