Release History

Telerik UI for WinForms 2025.2.520 (2025 Q2)

May 21, 2025

What's new

NEW

• RadMap: Add copyright label.
• UI Automation support for: RadMaskedEditBox, RadSpinEditor and RadTextBox.

Breaking Changes

• As part of the unified distribution effort, please make sure the following release note is included and marked as a breaking change in the upcoming release: Unified distribution for trial and commercial packages: Streamlined user experience by consolidating trial and commercial packages into a single unified distribution for Telerik UI libraries. Access is now managed through a license key file, eliminating the need for separate trial downloads. For more information, please refer to the Setting Up License Key

Common

Breaking Changes

• CHM and Help3 offline documentation resources are discontinued.
• .NET 6 distribution is discontinued, following the Microsoft's End of Support for .NET 6.
• The classes inside the Telerik.WinControls.Zip and Telerik.WinForms.Spreadsheet.Zip namespaces are removed from the Telerik.WinControls and Telerik.WinControls.RadSpreadsheet assemblies. Please transition to System.IO.Compression or Telerik Document Processing libraries for continued Zip functionality.

Dependencies

• Telerik Document Processing Library (DPL) version is updated to 2025.2.520.

.NET Core Designer

FIXED

• Visual Studio 2022 crashes when switching between WinForms designers in .NET 6 and .NET 9 projects.

Installation and general issues

NEW

• With the introduction of our new licensing mechanism, Telerik UI for WinForms has simplified the deployment requirements for products with free or trial versions. Starting from 2025 it is no longer necessary to protect the assemblies using the methods desribed here: Redistributing Telerik UI for WinForms - Telerik UI for WinForms.

QSF

FIXED

• QuickStart solution can't be loaded in VS (missing ConmmonConfig.targets file).

RadCommandBar

FIXED

• Incorrect font scaling on 300% DPI.

RadDiagram

FIXED

• Connection text element is drawn in the wrong position.

RadDropDownList

NEW

• Expose the Telerik TextBoxItem to UIA.

RadForm

FIXED

• Size is increased when ClientSize is set inside the form's constructor.
• Size is changed after minimizing the form in MDI scenario where RadForm is child of another child form.
• The StartPosition is not correct on HDPI displays.
• At run-time the ClientSize is increased compared to the serialized in the designer value.

RadGridView

FIXED

• Setting the DataSource to Null does not reset the paging index
• Mutliple GridTableElement properties, including EnableHotTracking, are propagated to child table elements in hierarchy. The properties are synced only once upon opening the child template.
• NullReferenceException is thrown when in multi-select scenario while you have MergedCells.
• NullReference exception is thrown when exporting empty cell in the GridViewHyperlinkColumn.
• CellBeginEdit is called twice when canceling the event while using GridViewCheckBoxColumn.
• PDF export throws NullReferenceException when ExportVisualSettings is enabled
• NullReferenceException is thrown when using custom RadListFilterPopup

RadMap

NEW

• Add copyright label.

RadMaskedEditBox

NEW

• UI Automation support.

RadPageView

FIXED

• Edit operation is triggered when dragging a page item.

RadPdfViewer

FIXED

• When a specific single page is defined in the print range, it always prints the first page.

RadPropertyGrid

FIXED

• Incorrect scroll behavior in group scenario.

RadRichTextEditor

FIXED

• Scrollbars are shown on HDPI monitor when they are not neede.
• Importing document which contains hyperlink, adds simultaneously FieldRangeStart and HyperlinkRangeStart to the document.
• The hyperlink is duplicated after it is edited in a RTF document.

RadScheduler

FIXED

• Scrolling while dragging the appointment stops when the mouse leaves the boundaries of the column header cell.

RadSpinEditor

NEW

• UI Automation support.

RadSpreadsheet

NEW

• Add possibility to move to the last used cell when using Ctrl+End key combination.

RadSyntaxEditor

FIXED

• Horizontal always visible, but after (toggling) wordwrap never visible.

RadTextBox

NEW

• UI Automation support.

RadTrackbar

FIXED

• SmallTickHeight property does not update tick height properly.

RadTreeView

FIXED

• ImageKey is cleared when moving a node from one treeview to another and disposing the first.

RadValidationProvider

FIXED

• ValidateCore throws System.NullReferenceException if assigned value of PropertyName is not found.

TPF

FIXED

• Blurred text in disabled state when the UseCompatibleTextRendering property is set to false.

Infrastructure

FIXED

• UI.for.WinForms.AllControls NuGet asks for a WPF license key.