Hey guys, I've just encountered this exception when our WPF desktop application is attempting to load on a couple of Windows XP systems. I've never seen this before (even on other XP systems) and it seems to be coming from within the NetAdvantage libraries. Although it's highly possible it's due to my use of those libraries.

I can't think of any reason these two systems would have this problem. My application and the assemblies I'm using are all targeting .Net CLR 4.0 which these machines do have.

Any insight would be greatly appreciated!

Here's the exception:

System.Windows.Markup.XamlParseException: The invocation of the constructor on type 'Infragistics.Windows.Ribbon.RibbonWindowContentHost' that matches the specified binding constraints threw an exception. ---> System.Xaml.XamlObjectWriterException: Set property 'System.Windows.ResourceDictionary.DeferrableContent' threw an exception. ---> System.ArgumentException: Item has already been added. Key in dictionary: 'RibbonBrushKeys.ScenicCaptionCloseBtnPressedBorderFillKey' Key being added: 'RibbonBrushKeys.ScenicCaptionCloseBtnPressedBorderFillKey'
at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)
at System.Collections.Hashtable.Add(Object key, Object value)
at System.Windows.ResourceDictionary.SetKeys(IList`1 keyCollection, IServiceProvider serviceProvider)
at System.Windows.ResourceDictionary.SetDeferrableContent(DeferrableContent deferrableContent)
at System.Windows.Baml2006.WpfSharedBamlSchemaContext.<Create_BamlProperty_ResourceDictionary_DeferrableContent>b__168(Object target, Object value)
at System.Windows.Baml2006.WpfKnownMemberInvoker.SetValue(Object instance, Object value)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(XamlMember member, Object obj, Object value)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(Object inst, XamlMember property, Object value)
--- End of inner exception stack trace ---
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(Object inst, XamlMember property, Object value)
at MS.Internal.Xaml.Runtime.PartialTrustTolerantRuntime.SetValue(Object obj, XamlMember property, Object value)
at System.Xaml.XamlObjectWriter.SetValue(Object inst, XamlMember property, Object value)
at System.Xaml.XamlObjectWriter.Logic_ApplyPropertyValue(ObjectWriterContext ctx, XamlMember prop, Object value, Boolean onParent)
at System.Xaml.XamlObjectWriter.Logic_DoAssignmentToParentProperty(ObjectWriterContext ctx)
at System.Xaml.XamlObjectWriter.WriteEndMember()
at System.Xaml.XamlWriter.WriteNode(XamlReader reader)
at System.Xaml.XamlServices.Transform(XamlReader xamlReader, XamlWriter xamlWriter, Boolean closeWriter)
at System.Xaml.XamlServices.Transform(XamlReader xamlReader, XamlWriter xamlWriter)
at System.Windows.SystemResources.ResourceDictionaries.LoadDictionary(Assembly assembly, String assemblyName, String resourceName, Boolean isTraceEnabled)
at System.Windows.SystemResources.ResourceDictionaries.LoadThemedDictionary(Boolean isTraceEnabled)
at System.Windows.SystemResources.FindDictionaryResource(Object key, Type typeKey, ResourceKey resourceKey, Boolean isTraceEnabled, Boolean allowDeferredResourceReference, Boolean mustReturnDeferredResourceReference, Boolean& canCache)
at System.Windows.SystemResources.FindResourceInternal(Object key, Boolean allowDeferredResourceReference, Boolean mustReturnDeferredResourceReference)
at System.Windows.FrameworkElement.FindResourceInternal(FrameworkElement fe, FrameworkContentElement fce, DependencyProperty dp, Object resourceKey, Object unlinkedParent, Boolean allowDeferredResourceReference, Boolean mustReturnDeferredResourceReference, DependencyObject boundaryElement, Boolean isImplicitStyleLookup, Object& source)
at System.Windows.ResourceReferenceExpression.GetRawValue(DependencyObject d, Object& source, DependencyProperty dp)
at System.Windows.ResourceReferenceExpression.GetValue(DependencyObject d, DependencyProperty dp)
at System.Windows.DependencyObject.EvaluateBLOCKED EXPRESSION