By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement . We’ll occasionally send you account related emails.

Describe the bug

When the application is open and no interaction is done for several minutes (without focus), an error occurs: "Cannot find resource named 'MahApps.Colors.Highlight'".

Stacktrace:

[14:57:34 FTL 1 MyApplication.App] An unhandled exception has occurred System.Windows.Markup.XamlParseException: 'Provide value on 'System.Windows.Markup.StaticResourceHolder' threw an exception.' Line number '39' and line position '91'. ---> System.Exception: Cannot find resource named 'MahApps.Colors.Highlight'. Resource names are case sensitive. at System.Windows.StaticResourceExtension.ProvideValueInternal(IServiceProvider serviceProvider, Boolean allowDeferredReference) at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider) --- End of inner exception stack trace --- at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) at System.Windows.ResourceDictionary.CreateObject(KeyRecord key) at System.Windows.ResourceDictionary.OnGettingValue(Object key, Object& value, Boolean& canCache) at System.Windows.ResourceDictionary.OnGettingValuePrivate(Object key, Object& value, Boolean& canCache) at System.Windows.ResourceDictionary.GetValueWithoutLock(Object key, Boolean& canCache) at System.Windows.ResourceDictionary.GetValue(Object key, Boolean& canCache) at System.Windows.ResourceDictionary.GetValueWithoutLock(Object key, Boolean& canCache) at System.Windows.ResourceDictionary.GetValue(Object key, Boolean& canCache) at System.Windows.DeferredResourceReference.GetValue(BaseValueSourceInternal valueSource) at System.Windows.DeferredAppResourceReference.GetValue(BaseValueSourceInternal valueSource) at System.Windows.DependencyObject.GetEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, RequestFlags requests) at System.Windows.DependencyObject.GetValueEntry(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, RequestFlags requests) at System.Windows.DependencyObject.GetValue(DependencyProperty dp) at System.Windows.StyleHelper.GetChildValueHelper(UncommonField 1 dataField, ItemStructList 1& valueLookupList, DependencyProperty dp, DependencyObject container, FrameworkObject child, Int32 childIndex, Boolean styleLookup, EffectiveValueEntry& entry, ValueLookupType& sourceType, FrameworkElementFactory templateRoot) at System.Windows.StyleHelper.GetChildValue(UncommonField 1 dataField, DependencyObject container, Int32 childIndex, FrameworkObject child, DependencyProperty dp, FrugalStructList 1& childRecordFromChildIndex, EffectiveValueEntry& entry, ValueLookupType& sourceType, FrameworkElementFactory templateRoot) at System.Windows.StyleHelper.GetValueFromTemplatedParent(DependencyObject container, Int32 childIndex, FrameworkObject child, DependencyProperty dp, FrugalStructList 1& childRecordFromChildIndex, FrameworkElementFactory templateRoot, EffectiveValueEntry& entry)
at System.Windows.FrameworkElement.GetValueFromTemplatedParent(DependencyProperty dp, EffectiveValueEntry& entry)
at System.Windows.FrameworkElement.GetRawValue(DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry& entry)
at System.Windows.FrameworkElement.EvaluateBaseValueCore(DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry& newEntry)
at System.Windows.DependencyObject.EvaluateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry newEntry, OperationType operationType)
at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
at System.Windows.StyleHelper.InvalidateDependents(Style ownerStyle, FrameworkTemplate frameworkTemplate, DependencyObject container, DependencyProperty dp, FrugalStructList 1& dependents, Boolean invalidateOnlyContainer) at System.Windows.StyleHelper.OnTriggerSourcePropertyInvalidated(Style ownerStyle, FrameworkTemplate frameworkTemplate, DependencyObject container, DependencyProperty dp, DependencyPropertyChangedEventArgs changedArgs, Boolean invalidateOnlyContainer, FrugalStructList 1& triggerSourceRecordFromChildIndex, FrugalMap& propertyTriggersWithActions, Int32 sourceChildIndex)
at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
at System.Windows.ResourceReferenceExpression.InvalidateExpressionValue(Object sender, EventArgs e)
at System.Windows.TreeWalkHelper.InvalidateResourceReferences(DependencyObject d, ResourcesChangeInfo info)
at System.Windows.TreeWalkHelper.OnResourcesChanged(DependencyObject d, ResourcesChangeInfo info, Boolean raiseResourceChangedEvent)
at System.Windows.TreeWalkHelper.OnResourcesChangedCallback(DependencyObject d, ResourcesChangeInfo info, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren)
at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren)
at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1._VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.VisitNode(FrameworkElement fe, Boolean visitedViaVisualTree)
at System.Windows.DescendentsWalker 1.VisitNode(DependencyObject d, Boolean visitedViaVisualTree) at System.Windows.DescendentsWalker 1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren)
at System.Windows.DescendentsWalker 1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker 1.IterateChildren(DependencyObject d)
at System.Windows.DescendentsWalker 1.StartWalk(DependencyObject startNode, Boolean skipStartNode) at System.Windows.TreeWalkHelper.InvalidateOnResourcesChange(FrameworkElement fe, FrameworkContentElement fce, ResourcesChangeInfo info) at System.Windows.Application.InvalidateResourceReferenceOnWindowCollection(WindowCollection wc, ResourcesChangeInfo info) at System.Windows.ResourceDictionary.NotifyOwners(ResourcesChangeInfo info) at System.Windows.ResourceDictionary.EndInit() at ControlzEx.Theming.ThemeManager.ChangeTheme(Object target, ResourceDictionary resourceDictionary, Theme oldTheme, Theme newTheme) at ControlzEx.Theming.ThemeManager.ChangeTheme(Object target, ResourceDictionary resourceDictionary, Theme newTheme) at ControlzEx.Theming.ThemeManager.ChangeTheme(Application app, Theme newTheme) at ControlzEx.Theming.ThemeManager.SyncTheme(Nullable 1 syncMode)
at ControlzEx.Theming.ThemeManager.b__72_0()
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
[14:57:34 FTL 1 MyApplication.App] An unhandled exception has occurred
System.Windows.Markup.XamlParseException: 'Provide value on 'System.Windows.Markup.StaticResourceHolder' threw an exception.' Line number '33' and line position '20'.
---> System.Exception: Cannot find resource named 'MahApps.Colors.ThemeForeground'. Resource names are case sensitive.
at System.Windows.StaticResourceExtension.ProvideValueInternal(IServiceProvider serviceProvider, Boolean allowDeferredReference)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider)
--- End of inner exception stack trace ---
at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
at System.Windows.ResourceDictionary.CreateObject(KeyRecord key)
at System.Windows.ResourceDictionary.OnGettingValue(Object key, Object& value, Boolean& canCache)
at System.Windows.ResourceDictionary.OnGettingValuePrivate(Object key, Object& value, Boolean& canCache)
at System.Windows.ResourceDictionary.GetValueWithoutLock(Object key, Boolean& canCache)
at System.Windows.ResourceDictionary.GetValue(Object key, Boolean& canCache)
at System.Windows.ResourceDictionary.GetValueWithoutLock(Object key, Boolean& canCache)
at System.Windows.ResourceDictionary.GetValue(Object key, Boolean& canCache)
at System.Windows.DeferredResourceReference.GetValue(BaseValueSourceInternal valueSource)
at System.Windows.DeferredAppResourceReference.GetValue(BaseValueSourceInternal valueSource)
at System.Windows.DependencyObject.GetEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, RequestFlags requests)
at System.Windows.DependencyObject.GetValueEntry(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, RequestFlags requests)
at System.Windows.DependencyObject.GetValue(DependencyProperty dp)
at MS.Internal.Text.TextProperties.InitCommon(DependencyObject target)
at MS.Internal.Text.TextProperties..ctor(FrameworkElement target, Boolean isTypographyDefaultValue)
at System.Windows.Controls.TextBlock.GetLineProperties()
at System.Windows.Controls.TextBlock.EnsureTextBlockCache()
at System.Windows.Controls.TextBlock.OnRender(DrawingContext ctx)
at System.Windows.UIElement.Arrange(Rect finalRect)
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Primitives.TabPanel.ArrangeHorizontal(Size arrangeSize)
at System.Windows.Controls.Primitives.TabPanel.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Border.ArrangeOverride(Size finalSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at MS.Internal.Helper.ArrangeElementWithSingleChild(UIElement element, Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.Controls.Control.ArrangeOverride(Size arrangeBounds)
at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
at System.Windows.UIElement.Arrange(Rect finalRect)
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget)
at System.Windows.Interop.HwndTarget.OnResize()
at System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
Exception thrown: 'System.Windows.Markup.XamlParseException' in PresentationFramework.dll
'Provide value on 'System.Windows.Markup.StaticResourceHolder' threw an exception.' Line number '29' and line position '20'.

Steps to reproduce

Environment

MahApps.Metro version: v2.4.7
Windows build number: Win10 1909 [Version 18363.1556]
Visual Studio: 2019 16.6.0
Target Framework: .Net 5
          
Hi @pedrohex
I cannot reproduce this issue on my Apps and some of them I have open a whole day, most of the time idle. So I think there is something your App is doing after a certain time (display a message e.g.) and this causes the issue. Can you try to create a sample App showing your issue and create a repro on github for this?
Happy coding

          
Hi @timunie ,
I've tried different scenarios and using both development branches from Mahapps and ControlzEx with the project, I'm not able to reproduce the error. This is really weird, probably fixed in this branches ? I don't know.
Meanwhile I didn't have the time to share a test project, I will do that soon and let you know.
Thank you.
          
Hi @timunie ,

Found out the problem and I'm able to reproduce it.

I think this will be a problem in ControlzEx and not directly in the Mahapps, but please check it out if you can. Also maybe my custom themes initialization, are not as they should.
To reproduce:

1- Check this repository: https://github.com/pedrohex/mahappsthemedemo

2- Initialize the application

3- Switch to the dark theme using the "Change Theme" button.

4- using Windows 10 , select Settings > Colors and change to another "Windows Color".

5- Notice that the theme will change to one of the defaults and not the correct one.
Like I said before, probably the problem is at ControlzEx ThemeManager as it looks for a theme using:

var theme = this.Themes.FirstOrDefault(x => x.BaseColorScheme == baseColorScheme && x.ColorScheme == colorScheme && x.IsHighContrast == highContrast);
First(or default) will allways try to apply the internal themes and not the custom ones. The errors occurs at ControlzEx.ThemeManager:621 when trying to remove the old theme keys. If the custom theme has the same keys, they will be removed and not found when applying them.
Can you help please? Thanks
          
Hi @pedrohex ,
If I may suggest a solution, I would use runtime generated Themes instead of shipping a hard coded one. I have good experience with this in my Apps.
Here is more on the ThemeManager: https://github.com/ControlzEx/ControlzEx/blob/develop/Wiki/ThemeManager.md

PR: https://github.com/pedrohex/mahappsthemedemo/pull/1
Happy coding

          
I have ran into this same issue. I created a custom theme because I needed to include additional colors for Light and dark themes for log messages. After a period of time with the application not having focus, the theme breaks. I managed to capture the execution and found that it is indeed occurring in the ThemeManager in a call to SyncTheme() from HandleStaticPropertyChanged. Interestingly the property that triggered the event when I was writing this comment was WindowResizeBorderThickness from SystemParameters.InvalidateWindowFrameThicknessProperties().