Verification on non-entity properties

**I posted incorrect information earlier. This post has now been corrected and the thread has been cleaned up to avoid confusion.**

Is it possible to use DevForce verification on non-entity properties?

for example:

public class MyViewModel : INotifyPropertyChanged
{
    string _valtest;
    [StringLengthVerifier(MinValue = 5, MaxValue = 30, IsRequired = true)]
    public string ValTest
    {
      get { return _valtest;}
      set { _valtest = value; }
    }

     // OnShow method
   {
         IEntityManagerProvider _entityManagerProvider = ServiceLocator.Current.GetInstance<IEntityManagerProvider>();
        _entityManagerProvider.EntityManager.VerifierEngine.DiscoverVerifiers(typeof(MyViewModel ));
   }
}

Why isn't the trigger firing, or if it is, why no exception?  I've verified that the StringLengthVerifier is being placed in the VerifierEngine, so that much is working.

It works if I throw this code in the setter, but that's not very 
pretty.  
    set {
        IEntityManagerProvider _entityManagerProvider = ServiceLocator.Current.GetInstance<IEntityManagerProvider>();
        VerifierResultCollection results = _entityManagerProvider.EntityManager.VerifierEngine.Execute(this, "ValTest", value);
        foreach (VerifierResult aResult in results)
          if (aResult.IsError)
            throw new Exception(aResult.Description);
        _valtest = value;
    }

I've also tried putting the VerifierEngine.Execute() in a [BeforeSet] adorned method, but the method is never executed.

Issue #2 - 
getting an exception:

"Attempt by method 'IdeaBlade.Validation.VerifierEngine.set_ErrorsResourceManager(System.Resources.ResourceManager)' to access field 'IdeaBlade.Validation.VerifierErrorsResource.resourceMan' failed."

on the 2nd line of code below:

DomainModelEntityManager mgr = new DomainModelEntityManager();
mgr.VerifierEngine.ErrorsResourceManager = VerifierErrorsResource.ResourceManager;

I know "engine" is valid since the previous line sets PropertyNameToDisplayNameTranslator with no problems. VerifierErrorsResource is the resx file found in the DevForce install along with the generated Designer.cs file with the class.

This works fine in WPF, but fails in Silverlight.  (running v5.2.6.0)

Thanks!

Edited by mikewishart - 11-Mar-2010 at 9:57pm