types.txt

public class Book
{
    public Guid Id { get; set; }

    public string Title { get; set; }

    public string Author { get; set; }
}

public class Album
{
    public Guid Id { get; set; }

    public string Title { get; set; }

    public string Artist { get; set; }
}

public class Person
{
    public Guid Id { get; set; }
    public string Name { get; set; }
    public long Phone { get; set; }
    public string Address { get; set; }
}