public MainPageDesignViewModel() {
 
      EntityManager = new NorthwindManager(false);
      EntityManager.DefaultQueryStrategy = QueryStrategy.CacheOnly;

      var designEmp = new Employee {
        EmployeeID = 1, FirstName = "Ima", LastName = "Blast", ReportsToEmployeeID = 2,
      };
      var designManagerEmp = new Employee {
        EmployeeID = 2, FirstName = "Slim", LastName = "Ornun", ReportsToEmployeeID = null,
      };

      EntityManager.AttachEntity(designEmp);
      EntityManager.AttachEntity(designManagerEmp);

      PotentialManagers = new List<Employee> { designManagerEmp };
      CurrentEmployee = designEmp;
      Messages.Add("We're in DesignTime now !!!");
    }

using System;
using System.Windows;
using System.Windows.Controls;
using System.IO;

namespace Kiosk.Testing.DataMaker {
  public partial class MainPage : UserControl {
    public MainPage() {
      InitializeComponent();
    }
 
    private void HandlePageLoaded(object sender, RoutedEventArgs e) {
      DataMaker = new TestDataMaker();
      DataMaker.ReadyToWrite += EnableSaveButton;
      DataMaker.Build();
    }
 
    private void EnableSaveButton(object sender, EventArgs args) {
      saveButton.IsEnabled = true;
      statusTB.Text = "Cache data is ready; click SAVE button to save to local file system.";
    }
 
    private void HandleSaveButtonClick(object sender, RoutedEventArgs e) {
      statusTB.Text = "Save to the file named "+ DataMaker.CacheFileName +
        " in the directory 'Kiosk.Model.Testing.SL'." ;
      OpenSaveFileDialog();
    }
 
    private bool OpenSaveFileDialog() {
 
      SaveFileDialog sfd = new SaveFileDialog() {
        DefaultExt = "dat",
        Filter = "Data files (*.dat)|*.dat|All files (*.*)|*.*",
        FilterIndex = 1
      };
 
      if (sfd.ShowDialog() == true) {
        statusTB.Text = "Saving cache data to " + sfd.SafeFileName +
          " ... please wait for next message ...";
 
        using (Stream stream = sfd.OpenFile()) {
          DataMaker.WriteCacheToStream(stream);
          stream.Close();
        }
 
        statusTB.Text = "Saved test data to " + sfd.SafeFileName +
          " ... You're done ... close the application.";
        return true;
      }
      statusTB.Text = "You cancelled ... cache data was not saved; you may close the app now." ;
      return false;
 
    }
 
    private TestDataMaker DataMaker { get; set; }
  
  }

IdeaBlade.Core.IdeaBladeConfig.Instance.ProbeAssemblyNames.Add(typeof(NorthwindIBEntities).Assembly.FullName);

Debugging Blend design time with VS2010 - Blend cannot seem to figure out whether to add the assembly name to 

IdeaBlade.Core or IdeaBlade.Core.SL (common names inside)

So the line fails and so then 

EntityCacheState.Restore(res.Stream)
 

fails too with null exceptions for each field and record during the load.

Is there a work-around to add the assembly full names ?

Thank you in advance.