Hi Lloyd

I don't have an answer to your problem. Sorry.
But today I have the same problem and don't know how to get the instance of
the ServiceProvider.

In my case I want get the "ObjectDataProvider"
How can tell us how we can get our ServiceObjects?

My Xaml:

 <ObjectDataProvider x:Key="VitoPatient" ObjectType="{x:Type
VFC:GetDataCommand}" MethodName="Execute">
....

 <StackPanel VFW:DesignView.DataContext="{Binding
Source={VFW:MyDynamicResource VitoPatient},
Path=ParentObjects[Person__Patient]}">
....

My Class:

 <MarkupExtensionReturnType(GetType(Object)),
TypeConverter(GetType(DynamicResourceExtensionConverter))> _
 Public Class MyDynamicResource
   Inherits System.Windows.DynamicResourceExtension

   Public Overrides Function ProvideValue(ByVal serviceProvider As
System.IServiceProvider) As Object
     If (Not VitoResourceManager.DesignMode) Then
       If (GetType(ObjectDataProvider).IsInstanceOfType(serviceProvider))
Then
         Return MyBase.ProvideValue(serviceProvider)
       Else
         Return MyBase.ProvideValue(serviceProvider)
       End If
     Else
       Return VitoApplication.FindDynamicResource(Me.ResourceKey.ToString)
     End If
   End Function

   Public Sub New()
     MyBase.New()
   End Sub

   Public Sub New(ByVal resourceKey As Object)
     MyBase.New(resourceKey)
   End Sub

 End Class