Release History

Telerik UI for WPF 2026.2.520 (2026 Q2)

May 20, 2026

What's New

NEW

• Enhanced the RadChat input area by adding the option to attach files and added RadSpeechToTextButton integration. TextMessages now support visualizing attached files.
• Smart Grid Features allow you to perform various operations via AI prompts, including sorting, grouping, selecting, highlighting, and more.

Common

CHANGED

• The following Nuget Packages: Telerik.UI.for.Wpf.462.Xaml, Telerik.UI.for.Wpf.80.Xaml, Telerik.UI.for.Wpf.462 and Telerik.UI.for.Wpf.80, which contained the full distribution, are discontinued with the current release. They are replaced by the new Telerik.UI.for.Wpf.AllControls.Xaml and Telerik.UI.for.Wpf.AllControls. These packages provide the same functionality by consolidating the core distribution components via dependencies. These packages are distributed as part of the Telerik_UI_for_WPF_[version]_NuGet_Separate_Packages_Xaml/NoXaml.
• Telerik.Windows.Controls.Charting.for.Wpf.Xaml NuGet is no longer produced. The assembly can be consumed from the distribution zipped artifacts.
• Satellite NuGet packages are no longer produced. The satellite assemblies are included in the Telerik.Windows.Controls Nuget.
• Removed duplicated NullToVisibilityConverter objects from the Telerik.Windows.Controls.Schedule and Telerik.Windows.Controls.PivotFieldList assemblies.

Dependencies

• Minimum required Telerik Licensing version updated to 1.8.2.
• Telerik Document Processing Library (DPL) version updated to 2026.2.519.

BusyIndicator

FIXED

• Setting the BusyContent property to a UI element shows its ToString value instead of the UI element itself.
• Watermark content is not localized dynamically.

Chat

NEW

• Improved input area with multiline text support.
• Integrated RadSpeechToTextButton for voice-to-text input.
• Added support for file attachments.

Breaking Changes

• Removed the toolbar related properties. Use the RadPromptInput API for commands instead. Added the RadSpeechToTextButton which requires adding the Microsoft.Web.WebView2 NuGet package.

Docking

NEW

• Introduced Minimize/Maximize buttons in the ToolWindow element.

GridView

NEW

• Smart Grid Features allow you to perform various operations via AI prompts, including sorting, grouping, selecting, highlighting, and more.

FIXED

• Possible performance degradation when using numerous GridViewCheckBox cells.

PDF Viewer

FIXED

• Images hosted inside multiple Form XObjects are not rendered.
• PDF documents gets a lot of black/grey images.

PivotGrid

NEW

• Add an option for the GenerateExport method to copy the raw data rather than the formatted one.

FIXED

• Wrong localization strings for the Spanish culture for some of the resource keys.

RichTextBox

NEW

• The UpdateViewPort method of the SelectionUILayer class is now virtual, so it can be overridden.

FIXED

• A System.NullReferenceException is thrown when using the Ctrl + Left Mouse Button to select multiple separate text blocks or non-adjacent table cells.

ScheduleView

NEW

• Added ActiveViewDefinitionChanged event.

FIXED

• A XamlParseException is raised when opening the dialog to edit the recurrence of an appointment with the NoXaml assemblies.

Spreadsheet

NEW

• The menu items in the default context menu (WorksheetEditorContextMenu) are now localized.

FIXED

• The ScreenTip label in the Hyperlink dialog is vertically misaligned to the associated TextBox in the Windows 11 theme.