Example - XML Databas

namespace XML {
    class Program {

        static void Main(string[] args) {
            XmlDocument xml = new XmlDocument();
            xml.Load("..\\..\\..\\media.xml"); //c#-programmet körs inte i samma fil som .sln-filen ligger i, ..\\ går upp en fil

            List<Media> medias = new List<Media>();

            XmlNodeList books = xml.SelectNodes("media/books/book");

            foreach(XmlNode book in books) {
                string author = book.SelectSingleNode("author").InnerText;
                string title = book.SelectSingleNode("title").InnerText;
                string language = book.SelectSingleNode("title").InnerText;
                string description = book.SelectSingleNode("description").InnerText;
                medias.Add(new Book(author, title, language, description));
            }

            XmlNodeList movies = xml.SelectNodes("media/movies/movie");
            foreach (XmlNode movie in movies) {
                string director = movie.SelectSingleNode("director").InnerText;
                string title = movie.SelectSingleNode("title").InnerText;
                string language = movie.SelectSingleNode("title").InnerText;
                string description = movie.SelectSingleNode("description").InnerText;
                medias.Add(new Movie(director, title, language, description));
            }

            foreach(Media media in medias) {
                media.PrintMedia();
            }

            Console.ReadKey(true);
        }


    }

    abstract class Media {
        public Media(string title, string language, string description) {
            this.title = title;
            this.language = language;
            this.description = description;
        }
        public abstract void PrintMedia();
        public string type { get; private set; }
        public string title { get; private set; }
        public string language { get; private set; }
        public string description { get; private set; }
    }
    class Book : Media {
        public Book(string author, string title, string language, string description) : base(title, language, description) {
            this.author = author;
        }
        public override void PrintMedia() {
            Console.WriteLine("<=== Book: " + title);
            Console.WriteLine("Author: " + author);
            Console.WriteLine("Language: " + language);
            Console.WriteLine("Description: " + description + " ===>\n");
        }
        public string author { get; private set; }

    }
    class Movie : Media {
        public Movie(string director, string title, string language, string description) : base(title, language, description) {
            this.director = director;
        }
        public override void PrintMedia() {
            Console.WriteLine("<=== Movie: " + title);
            Console.WriteLine("Director: " + director);
            Console.WriteLine("Language: " + language);
            Console.WriteLine("Description: " + description + " ===>\n");
        }
        public string director { get; set; }
    }
}