Patterns like _enum_class_ and _singletons_

Patterns.cs

    public class Planet // enum class
    {
        public static readonly Planet MERCURY = new Planet(1, "Mercury");
        public static readonly Planet VENUS = new Planet(2, "Venus");
        public static readonly Planet EARTH = new Planet(3, "Earth");
        public static readonly Planet MARS = new Planet(4, "Mars");
        public static readonly Planet JUPITER = new Planet(5, "Jupiter");
        public static readonly Planet SATURN = new Planet(6, "Saturn");
        public static readonly Planet URANNUS = new Planet(7, "Uranus");
        public static readonly Planet NEPTUNE = new Planet(8, "Naptune");

        public int ID => this.id;
        public string Name => this.name;

        private readonly int id;
        private readonly string name;

        private Planet(int id, string name)
        {
            this.id = id;
            this.name = name;
        }
    }

            Planet myPlanet = Planet.EARTH;
            Console.WriteLine(myPlanet.ID);
            Console.WriteLine(myPlanet.Name);
            Console.ReadKey();