using System;   

using System.Collections.Generic;   

using System.Reflection;

public class Program

{

    public static void Main()

    {

        Manager.Go(); // just to invoke static ctor

    }

}

​

public static class Manager

{

    //private static readonly Dictionary<string, ConfigClass> _cache = new Dictionary<string, ConfigClass>();

​

    static Manager()

    {

        //_cache = LoadFile();

​

        // get a collection of valid IDs defined in the project.

        List<string> validIDs = new List<string>();

        List<Type> containers = new List<Type>{typeof(Container)};

        foreach(var cont in containers)

        {

            MemberInfo[] members = cont.GetMembers(BindingFlags.Static | BindingFlags.Public);

            foreach(var mb in members)

            {

                FieldInfo field = cont.GetField(mb.Name);

                if(field.FieldType.BaseType == typeof(BaseClass))

                {

                    var instance = (BaseClass)field.GetValue(null);

                    //********************* 

                    string id = instance.ID;

                    //*********************

​

                    validIDs.Add(id);

                }

            }

        }

        Console.WriteLine(String.Join(",", validIDs));

​

        // update the cache.

        //AddMissingEntriesToCache(validIDs, _cache);

        //RemoveObsoleteEntriesFromCache(validIDs, _cache);

        //SaveFile(_cache);

    }

    public static void Go(){} 

}

​

public abstract class BaseClass

{

    public abstract string ID { get; }

}

public class MyClass : BaseClass

{

    public override string ID { get { return "MyClass"; } }

}

​

public class YourClass : BaseClass

{

    public override string ID { get { return "YourClass"; } }

}

​

internal static class Container

{

    public static readonly MyClass Option1 = new MyClass();

    public static readonly YourClass Option2 = new YourClass();

}