Referencing WMI Manageable class from another WMI Class

Question

Hi,
I am trying to have WMI manageable class referring to another WMI manageable class
Something like
[ManagementEntity]
Class A
[ManagementEntity]
Class B
        [ManagementReference(Type = "A")]
        [ManagementProbe]
        public A AClass;
When trying to install the class, I am getting “Type unsupported”
I tried the Microsoft
ManagementReference sample,
http://msdn.microsoft.com/en-us/library/system.management.instrumentation.managementreferenceattribute.aspx
(working fine but the LetterPhonetic class won’t show on the WMI Object Browser)
Ideas will be highly appreciated
My Sample code
using System;
using System.Management.Instrumentation;
using System.Collections.Concurrent;
using System.Collections;
[assembly: WmiConfiguration("root\\ConsoleC", HostingModel = ManagementHostingModel.Decoupled)]
namespace ConsoleDecoupled
    [System.ComponentModel.RunInstaller(true)]
    public class TheInstaller : DefaultManagementInstaller
    public class Program
        public static void Main(string[] args)
            for (int i = 0; i < 10; ++i)
                TestEnumWmi ms = TestEnumWmi.CreateTestEnumWmi();
                ms.teststring = i.ToString();
            InstrumentationManager.RegisterType(typeof(TestEnumWmi));
            InstrumentationManager.RegisterType(typeof(RuntimeConfigSettings));
            Console.WriteLine("Press enter to exit");
            Console.ReadLine();
            InstrumentationManager.UnregisterType(typeof(TestEnumWmi));
            InstrumentationManager.UnregisterType(typeof(RuntimeConfigSettings));
    [ManagementEntity(Singleton = true, Name = "ConfigurationSample")]
    [ManagementQualifier("Description", Value = "Configuration Sample Application")]
    public class RuntimeConfigSettings
        [ManagementProbe]
        public string[] ReadMe;
        private int myVar;
        [ManagementConfiguration]
        public int MyProperty
            get { return myVar; }
            set { myVar = value; Console.WriteLine(value); }
        [ManagementReference(Type = "TestEnumWmi")]
        [ManagementProbe]
        public TestEnumWmi MSS;
        [ManagementBind]
        public RuntimeConfigSettings()
            ReadMe = new string[10];
            for (int i = 0; i < 10; ++i)
                ReadMe[i] = "blah " + i;
    [ManagementEntity(Name = "TestEnumWmi")]
    public class TestEnumWmi
        private TestEnumWmi()
        static internal TestEnumWmi CreateTestEnumWmi()
            TestEnumWmi ms = new TestEnumWmi();
            ms._id = Guid.NewGuid().ToString();
            ms.teststring = "blah";
            ms.TestInt = new Random().NextDouble();
            instantlist.TryAdd(ms._id, ms);
            return ms;
        [ManagementConfiguration()]
        public double TestInt { get; set; }
        [ManagementConfiguration()]
        public string teststring { get; set; }
        [ManagementKey(Name = "ID")]
        public string _id;
        [ManagementBind]
        static public TestEnumWmi GetInstant([ManagementName("ID")] string ID)
            TestEnumWmi ms = null;
            if (instantlist.TryGetValue(ID, out ms))
                return ms;
            else
                throw new InstanceNotFoundException();
        [ManagementEnumerator]
        static public IEnumerable EnumerateTestEnumWmis()
            foreach (var i in instantlist)
                yield return i.Value;
        static internal ConcurrentDictionary<string, TestEnumWmi> instantlist = new ConcurrentDictionary<string, TestEnumWmi>();

Answer 1

Hi,
The Microsoft ManagementReference sample you mentioned contains a bug:
Instead of:
inst.LetterNumber = "Letter = " + i;
inst.PhoneticNumber = "Phonetic = " + i;
The exact text (where spaces in the string are important and must be removed) should be:
inst.LetterNumber = "NumberLetter.Number=" + i;
inst.PhoneticNumber = "NumberPhonetic.Number=" + i;
With this fix, the hierarchy can now be navigated properly.
c.f. my response to the following blog post:
http://juggledthoughts.blogspot.co.uk/2008/06/wmi-association-classes.html
I have also
logged a bug on MSDN Feedback so please vote on this if you'd like them to fix the sample.