I'm using your richtextbox sample in our app and I'm getting the following exception thrown in Silverlight. Here is the call stack. The richtextbox and menues seem to work , but the silverlight onerror dialog comes up beforehand every time. Any ideas why this may be happening? Does it have something to do with the timing of loading the resource dictionary?
{System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
at System.ThrowHelper.ThrowKeyNotFoundException()}
{System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
at System.ThrowHelper.ThrowKeyNotFoundException()}
mscorlib.dll!System.ThrowHelper.ThrowKeyNotFoundException() + 0x1d bytes
mscorlib.dll!System.Collections.Generic.Dictionary<string,System.Reflection.Assembly>.this[string].get(string key) + 0x39 bytes
> System.Windows.dll!System.Windows.ResourceManagerWrapper.GetResourceForUri(System.Uri xamlUri, System.Type componentType) + 0xd6 bytes
System.Windows.dll!MS.Internal.JoltHelper.GetResourceFromAssembly(string Uri, ref MS.Internal.CValue resourceStream, ref uint nCount) + 0x51 bytes
[Managed to Native Transition]
System.Windows.dll!MS.Internal.XcpImports.SetValue(MS.Internal.IManagedPeerBase obj, System.Windows.DependencyProperty property, System.Windows.DependencyObject doh) + 0x75 bytes
System.Windows.dll!System.Windows.DependencyObject.SetValue(System.Windows.DependencyProperty property, System.Windows.DependencyObject doh) + 0x2c bytes
System.Windows.dll!System.Windows.Controls.Image.Source.set(System.Windows.Media.ImageSource value) + 0x24 bytes
Telerik.Windows.Controls.RibbonBar!Telerik.Windows.Controls.RadRibbonDropDownButton.ApplyImage() + 0x26d bytes
Telerik.Windows.Controls.RibbonBar!Telerik.Windows.Controls.RadRibbonDropDownButton.OnApplyTemplate() + 0xf2 bytes
System.Windows.dll!System.Windows.FrameworkElement.OnApplyTemplate(System.IntPtr nativeTarget) + 0x5b bytes
[Managed to Native Transition]
System.Windows.dll!MS.Internal.XcpImports.FrameworkElement_MeasureOverride(System.Windows.FrameworkElement element, System.Windows.Size availableSize) + 0x62 bytes
System.Windows.dll!System.Windows.FrameworkElement.MeasureOverride(System.Windows.Size availableSize) + 0x18 bytes
System.Windows.dll!System.Windows.FrameworkElement.MeasureOverride(System.IntPtr nativeTarget, float inWidth, float inHeight, out float outWidth, out float outHeight) + 0xa3 bytes
3 Answers, 1 is accepted
Can you give us some more details on your application, e.g. what UI controls are you using (RadRichTextBoxRibbonUI, ContextMenu, SelectionMiniToolBar, some custom UI) and what styles are you using?
Kind regards,Iva
the Telerik team

<telerik:RadRichTextBoxRibbonUI ApplicationButtonImageSource="/RichTextBox;component/Images/RichTextBox/MSOffice/AppIcon-telerik.png" ApplicationName="Client Content Editor" DataContext="{Binding Path=Commands, ElementName=editor}" Name="radRichTextBoxRibbonUI">
<telerik:RadRichTextBoxRibbonUI.Resources>
<telerik:FontFamiliesProvider x:Key="FontFamiliesProvider" />
</telerik:RadRichTextBoxRibbonUI.Resources>
<telerik:RadRichTextBoxRibbonUI.QuickAccessToolBar>
<telerik:QuickAccessToolBar>
<!--<telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=SaveCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/save.png" Text="Save" />-->
<telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=UndoCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/undo.png" Text="Undo" />
<telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=RedoCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/redo.png" Text="Redo" />
</telerik:QuickAccessToolBar>
</telerik:RadRichTextBoxRibbonUI.QuickAccessToolBar>
<telerik:RadRibbonTab Header="Home">
<telerik:RadRibbonGroup Header="Clipboard">
<telerik:RadRibbonGroup.Variants>
<telerik:GroupVariant Priority="0" Variant="Medium" />
</telerik:RadRibbonGroup.Variants>
<StackPanel>
<telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=CutCommand}" Size="Medium" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/cut.png" Text="Cut" />
<telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=CopyCommand}" Size="Medium" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/copy.png" Text="Copy" />
<telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=PasteCommand}" Size="Medium" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/paste.png" Text="Paste" />
</StackPanel>
</telerik:RadRibbonGroup>
<telerik:RadRibbonGroup DialogLauncherVisibility="Visible" Header="Font" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ShowFontPropertiesDialogCommand}">
<telerik:RadRibbonGroup.Variants>
<telerik:GroupVariant Priority="2" Variant="Medium" />
<telerik:GroupVariant Priority="4" Variant="Small" />
<telerik:GroupVariant Priority="5" Variant="Collapsed" />
</telerik:RadRibbonGroup.Variants>
<telerik:RadOrderedWrapPanel>
<StackPanel Orientation="Horizontal">
<telerik:RadRibbonComboBox CanAutocompleteSelectItems="False" CanKeyboardNavigationSelectItems="False" CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=SelectedValue}" Height="21" IsReadOnly="True" ItemsSource="{Binding Source={StaticResource FontFamiliesProvider}, Path=RegisteredFonts}" OpenDropDownOnFocus="True" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeFontFamilyCommand}" Width="132" />
<telerik:RadRibbonComboBox CanAutocompleteSelectItems="False" CanKeyboardNavigationSelectItems="False" CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=SelectedItem.Tag}" Height="21" IsEditable="True" IsReadOnly="True" IsTextSearchEnabled="False" OpenDropDownOnFocus="True" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeFontSizeCommand}" Width="45">
<telerik:RadRibbonComboBoxItem Content="8" Tag="10.67" />
<telerik:RadRibbonComboBoxItem Content="9" Tag="12" />
<telerik:RadRibbonComboBoxItem Content="10" Tag="13.33" />
<telerik:RadRibbonComboBoxItem Content="11" Tag="14.67" />
<telerik:RadRibbonComboBoxItem Content="12" Tag="16" />
<telerik:RadRibbonComboBoxItem Content="14" Tag="18.67" />
<telerik:RadRibbonComboBoxItem Content="16" Tag="21.33" />
<telerik:RadRibbonComboBoxItem Content="18" Tag="24" />
<telerik:RadRibbonComboBoxItem Content="20" Tag="26.67" />
<telerik:RadRibbonComboBoxItem Content="22" Tag="29.33" />
<telerik:RadRibbonComboBoxItem Content="24" Tag="32" />
<telerik:RadRibbonComboBoxItem Content="26" Tag="34.67" />
<telerik:RadRibbonComboBoxItem Content="28" Tag="37.33" />
<telerik:RadRibbonComboBoxItem Content="36" Tag="48" />
<telerik:RadRibbonComboBoxItem Content="48" Tag="64" />
<telerik:RadRibbonComboBoxItem Content="72" Tag="96" />
</telerik:RadRibbonComboBox>
</StackPanel>
<telerik:RadButtonGroup>
<telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=IncrementFontSizeCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/font-increasesize.png" />
<telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=DecrementFontSizeCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/font-decreasesize.png" />
</telerik:RadButtonGroup>
<telerik:RadButtonGroup>
<telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ClearFormattingCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/ClearFormatting16.png" />
</telerik:RadButtonGroup>
<telerik:RadButtonGroup>
<telerik:RadRibbonToggleButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleBoldCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/bold.png" />
<telerik:RadRibbonToggleButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleItalicCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/italic.png" />
<telerik:RadRibbonSplitButton IsToggle="True" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleUnderlineCommand}" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/underline.png">
<telerik:RadRibbonSplitButton.DropDownContent>
<telerik:RadGallery ItemHeight="26" ItemWidth="156" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeUnderlineDecorationCommand}" ViewportHeight="210" ViewportWidth="157">
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline1.png" Tag="Line" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline2.png" Tag="DoubleLine" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline3.png" Tag="ThickLine" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline4.png" Tag="DottedLine" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline5.png" Tag="DashedLine" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline6.png" Tag="DotDashedLine" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline7.png" Tag="DotDotDashedLine" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/underline8.png" Tag="Wave" />
</telerik:RadGallery>
</telerik:RadRibbonSplitButton.DropDownContent>
</telerik:RadRibbonSplitButton>
<telerik:RadRibbonToggleButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleStrikethroughCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/Strikethrough16.png" />
<telerik:RadRibbonToggleButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleSubscriptCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/subscript.png" />
<telerik:RadRibbonToggleButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleSuperscriptCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/superscript.png" />
</telerik:RadButtonGroup>
<telerik:RadButtonGroup>
<telerik:HighlightColorPicker AutomaticColor="Transparent" Height="22" Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/highlight.png" NoColorText="No color" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeFontHighlightColorCommand}" SelectedColor="Yellow" />
<telerik:HighlightColorPicker Height="22" Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/FontForeColor.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeFontForeColorCommand}" SelectedColor="Red" />
</telerik:RadButtonGroup>
</telerik:RadOrderedWrapPanel>
</telerik:RadRibbonGroup>
<telerik:RadRibbonGroup DialogLauncherVisibility="Visible" Header="Paragraph" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ShowParagraphPropertiesDialogCommand}">
<telerik:RadRibbonGroup.Variants>
<telerik:GroupVariant Priority="1" Variant="Medium" />
<telerik:GroupVariant Priority="3" Variant="Collapsed" />
</telerik:RadRibbonGroup.Variants>
<telerik:RadOrderedWrapPanel>
<telerik:RadButtonGroup>
<telerik:RadRibbonToggleButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleBulletsCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/list-bullets.png" />
<telerik:RadRibbonToggleButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleNumberedCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/list-numbered.png" />
<telerik:RadRibbonDropDownButton Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/MultilevelList.png">
<telerik:RadRibbonDropDownButton.DropDownContent>
<StackPanel>
<telerik:RadGroupHeader Content="List Library" />
<telerik:RadGallery ItemHeight="88" ItemWidth="88" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeListStyleCommand}" ViewportHeight="176" ViewportWidth="266">
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListNone.png" Tag="None" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListBulleted.png" Tag="Bulleted" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListNumbered.png" Tag="Numbered" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListNumberedParenthesis.png" Tag="NumberedParenthesis" />
<telerik:RadGalleryItem Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/MultilevelListNumberedHierarchical.png" Tag="NumberedHierarchical" />
</telerik:RadGallery>
</StackPanel>
</telerik:RadRibbonDropDownButton.DropDownContent>
</telerik:RadRibbonDropDownButton>
</telerik:RadButtonGroup>
<telerik:RadButtonGroup>
<telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=DecrementParagraphLeftIndentCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/outdent.png" />
<telerik:RadRibbonButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=IncrementParagraphLeftIndentCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/indent.png" />
</telerik:RadButtonGroup>
<telerik:RadButtonGroup>
<telerik:RadRibbonToggleButton telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleFormattingSymbolsCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/formatting-symbols.png" />
</telerik:RadButtonGroup>
<telerik:RadButtonGroup>
<telerik:RadRibbonToggleButton CommandParameter="Left" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeTextAlignmentCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/alignleft.png" Text="Align Left" />
<telerik:RadRibbonToggleButton CommandParameter="Center" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeTextAlignmentCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/aligncenter.png" Text="Center" />
<telerik:RadRibbonToggleButton CommandParameter="Right" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeTextAlignmentCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/alignright.png" Text="Align Right" />
<telerik:RadRibbonToggleButton CommandParameter="Justify" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeTextAlignmentCommand}" Size="Small" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/alignjustify.png" Text="Justify" />
</telerik:RadButtonGroup>
<telerik:RadButtonGroup>
<telerik:HighlightColorPicker AutomaticColor="Transparent" Height="20" Image="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/ParagraphBackgroundColor.png" NoColorText="No color" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ChangeParagraphBackgroundColorCommand}" SelectedColor="Transparent" />
</telerik:RadButtonGroup>
</telerik:RadOrderedWrapPanel>
</telerik:RadRibbonGroup>
<telerik:RadRibbonGroup Header="Editing & Proofing">
<telerik:RadRibbonGroup.Variants>
<telerik:GroupVariant Priority="0" Variant="Medium" />
</telerik:RadRibbonGroup.Variants>
<StackPanel>
<telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ShowFindReplaceDialogCommand}" Size="Medium" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/Find.png" Text="Find/Replace" />
<telerik:RadRibbonToggleButton CollapseToSmall="WhenGroupIsMedium" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ToggleSpellCheckingCommand}" Size="Medium" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/EnableSpellCheck.png" Text="Enable Spell Check" />
<telerik:RadRibbonButton CollapseToSmall="WhenGroupIsMedium" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=OpenContextMenuOnNextSpellingErrorCommand}" Size="Medium" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/FindNextSpellingError.png" Text="Find Next Error" />
</StackPanel>
</telerik:RadRibbonGroup>
</telerik:RadRibbonTab>
<telerik:RadRibbonTab Header="Insert">
<telerik:RadRibbonGroup Header="Pages">
<telerik:RadRibbonButton LargeImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/PageBreak.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=InsertPageBreakCommand}" Size="Large" Text="Page Break" />
</telerik:RadRibbonGroup>
<telerik:RadRibbonGroup Header="Tables">
<telerik:RadRibbonDropDownButton CollapseToMedium="WhenGroupIsMedium" Command="{Binding Path=InsertTableCommand}" LargeImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/InsertTable.png" Size="Large" Text="Insert">
<telerik:RadRibbonDropDownButton.DropDownContent>
<StackPanel>
<telerik:RadRibbonButton ClickMode="Press">
<telerik:TableSizePicker Command="{Binding Path=InsertTableCommand}" />
</telerik:RadRibbonButton>
<telerik:RadMenuItem IsSeparator="True" />
<telerik:RadRibbonButton HorizontalAlignment="Stretch" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ShowInsertTableDialogCommand}" Size="Medium" SmallImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/16/InsertTable.png" Text="Insert Table..." />
</StackPanel>
</telerik:RadRibbonDropDownButton.DropDownContent>
</telerik:RadRibbonDropDownButton>
</telerik:RadRibbonGroup>
<telerik:RadRibbonGroup Header="Illustrations">
<telerik:RadRibbonButton LargeImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/Picture.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=InsertPictureCommand}" Size="Large" Text="Picture" />
</telerik:RadRibbonGroup>
<telerik:RadRibbonGroup Header="Links">
<telerik:RadRibbonButton LargeImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/inserthyperlink.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ShowInsertHyperlinkDialogCommand}" Size="Large" Text="Hyperlink" />
<telerik:RadRibbonButton LargeImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/InsertBookmark.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ShowManageBookmarksDialogCommand}" Size="Large" Text="Bookmark" />
</telerik:RadRibbonGroup>
<telerik:RadRibbonGroup Header="Symbols">
<telerik:RadRibbonButton LargeImage="/Telerik.Windows.Controls.RichTextBoxUI;component/Images/MSOffice/32/Symbol.png" telerik:RadRichTextBoxRibbonUI.RichTextCommand="{Binding Path=ShowInsertSymbolWindowCommand}" Size="Large" Text="Symbol" />
</telerik:RadRibbonGroup>
</telerik:RadRibbonTab>
</telerik:RadRichTextBoxRibbonUI>
I guess that the problem is with the styles you are applying in your application, as the RibbonBar seems to be the default one with some parts removed and I did not manage to reproduce the problem.
You can try setting an empty style to RadDropAndDownButton in the resources of RadRichTextBox, as it should override the style in you application. Here is a sample code-snippet:
<
telerik:RadRichTextBoxRibbonUI.Resources
>
<
telerik:FontFamiliesProvider
x:Key
=
"FontFamiliesProvider"
/>
<
Style
TargetType
=
"telerik:RadRibbonDropDownButton"
/>
</
telerik:RadRichTextBoxRibbonUI.Resources
>
If that does not help, we would appreciate a sample project illustrating the behavior you are observing, so that we can identify the cause and come up with a fix.
Iva
the Telerik team