using System;

using System.Collections.Generic;

using System.Reflection;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Console.WriteLine(string.Join(",", Variables.VariableNames));

        Console.WriteLine(string.Join(",", Variables.VariableNames2));

    }

}

​

public class Variables

    {

        /* Elementary variables */

        public static readonly UInt16 Var1 = 1;

        public static readonly UInt16 Var2 = 2;

        public static readonly UInt16 Var3 = 3;

        public static IEnumerable<string> VariableNames

        {

           get

           {

              return typeof(Variables).GetFields(BindingFlags.Static | BindingFlags.Public).Select(x => x.Name);

           }

        }

        public static IEnumerable<string> VariableNames2 { get; } = new string[] { nameof(Var1), nameof(Var2), nameof(Var3) };

    }