<telerik:RadDocking HasDocumentHost="True">
    <telerik:RadDocking.DocumentHost>
        <telerik:RadSplitContainer>
            <telerik:RadPaneGroup>
                <telerik:RadDocumentPane Header="Document 1" Title="Document 1" />
            </telerik:RadPaneGroup>
        </telerik:RadSplitContainer>
    </telerik:RadDocking.DocumentHost>
</telerik:RadDocking>

Hi Team,

We are encountering an intermittent IndexOutOfRangeException when calling XamlFormatProvider.Export() on a RadDocument.

Exception stack:

System.IndexOutOfRangeException
 at System.Collections.Generic.Dictionary`2.Insert
 at Telerik.Windows.Documents.FormatProviders.Xaml.XamlWriter.TryGetTypeConverter
 at Telerik.Windows.Documents.FormatProviders.Xaml.XamlFormatProvider.Export(RadDocument)

Code:

private string ReadDocumentText(RadDocument document)
{
    if (document == null) return string.Empty;
    return new XamlFormatProvider().Export(document);
}

Notes:

• document is not null

• Each document is different

• Same code works for most documents

• The exception occurs inside Telerik export logic

• Documents are exported concurrently (parallel processing)

• No custom type converters or custom styles added explicitly

Questions:

• Is XamlFormatProvider.Export() thread-safe when used concurrently?

• Can concurrent exports cause internal state corruption (e.g. type converter dictionary)?

• Is there a recommended approach for exporting RadDocument in parallel (e.g. synchronization or per-thread isolation)?

Any guidance would be appreciated.

Thanks.
Zafeer

Hi ,

We have integrated RadRichTextBox into our WPF (C#) application and are trying to add RadCallout as a custom context menu. since the control is being created entirely in code-behind without XAML ,we are encountering implementation challenges.

Could you please guide us on how to achieve this?

Hello,

I have attempted to implement the solutions listed here.

We are using various ColorVariations along with our themes, however. For example:

StyleManager.ApplicationTheme = new Windows11Theme(Windows11Palette.ColorVariation.Dark);

The solutions listed in the link above throw the following exception:

System.InvalidOperationException: The calling thread cannot access this object because a different thread owns it.

Is there a way to use theme ColorVariations along with RadSplashScreen?

Thank you

We have an app that has RadComboBox controls arranged above some RadNumericUpDown controls. For the RadNumericUpDown controls we have it set up to open a numeric pad on PreviewMouseUp to support both mouse and touch. The issue we have is that when a combobox item is selected that lies over a numericupdown using touch, the numericupdown control receives the focus and activates the numeric pad. This does not occur when using a mouse.

Attached is an example derived from our app that reproduces this behavior. Selecting Pounds or Newtons from the Force combobox using touch will cause a message box to appear.

Is there any way to work around this behavior? It is annoying but not a show-stopper.

Thanks,
Jim

Hi,

When using RadGridView ExportAndShow method (GridViewExportFormat = Csv or Txt), the first data row is inserted next to column headers, it's missing a carriage return.

ResultGrid.ExportAndShow(GridViewExportFormat.Csv, "fileName.txt", true);

I'm using Telerik.UI.for.Wpf.80.Xaml 2025.4.1321

We are encountering severe UI thread blocking when using RadOpenFolderDialog during high-volume file operations (concurrent exports).

Technical Findings: After investigating the internal implementation, we identified the root cause in the DialogWindowBase class. Specifically, inside the SetupDialogContent method, the AddWatcher parameter is hardcoded to true.

This forces the underlying DirectoryInfoWrapper to initialize a FileSystemWatcher and unconditionally subscribe to the following events:

• Changed
• Created
• Deleted
• Renamed

Because our application generates a large volume of file events during export, these subscriptions flood the message pump and hang the UI thread.

The Question: Since AddWatcher is hardcoded, is there a supported way (or a workaround via reflection/subclassing) to:

Override SetupDialogContent to pass AddWatcher = false?

Access the DirectoryInfoWrapper instance post-initialization to manually unsubscribe from these events?

We urgently need to stop this component from listening to file system changes to maintain application responsiveness.

Version: 2024.4.1213.462

I have a WPF app with a RadMap and the ability for the user to change the UI language at runtime. This works for the most parts but the MapZoomBar component does not recognize the resetting of the CustomTelerikLocalizationManager class. On application startup it works as expected, but on runtime change it does not.

Is there a method to force a reload? My alternative is to dynamically recreate the MapZoomBar

Hi there,

I recently upgraded from 2024.3.821 to 2025.4.1111 and I found some weird issue when deserializing raddiagram xml.  Attached please see two SerializationInfo strings. Both of them can be deserialized in 2024.3.821 but the one named "diagram serialization info_bad" is not able to be deserialized completely in 2025.4.1111. I found the RadDiagramShape with Id = "7cc7b6c3-1606-453d-a9ab-ebc0bd53b207" is causing issue so I removed it from the SerializationInfo Info and named it "diagram serialization info_good". 

Please help me to check why the RadDiagramShape Id = "7cc7b6c3-1606-453d-a9ab-ebc0bd53b207" will cause issue in 2025.43.1111 since it didn't give me any error or exception.

my code is simple as:

SerializationInfo e1 = SerializationInfo.CreateDiagramInfo(serializationInfo);
RadDiagram.Deserialize(e1);

Thank you