Release History

Telerik UI for Silverlight is Retiring

Driven by the evolution of technology and industry standards, Progress Software is deprecating Telerik UI for Silverlight effective December 1, 2023. Technical support and critical fixes will be available until December 1, 2024.

UI for Silverlight R3 2017 SP1

October 17, 2017


  • Changing Start/End point of reflexive Bezier throws ArgumentOutOfRangeException.


  • DisplayMemberPath of GridViewComboboxColumn is now exported rather than SelectedValueMemberPath.
  • ClipboardCopyMode exposes new member - SkipEmptyColumns. Depending on whether it is set or not, an empty value will be copied or not.
  • Introduced ShowGroupHeaderRowAggregates bool property in GridViewDocumentExportOptions to show/hide group header row aggregates in exported documents.
  • When all values in one of the columns which is not the last one are null, the headers mismatch on copying.
  • Memory leak when GridViewColumn.CopyPropertiesFrom method is used.
  • Occasionally group header aggregates shown misplaced values when scrolling.
  • Setting HyperLinkColumn as current column and scrolling horizontally drastically degrades performance.

PDF Viewer

  • Annotations are not printed.
  • Highlight annotation covers the text it highlights.
  • PercentComboBox is not visible in all themes available in Silverlight when StyleManager is used.
  • StackOverflowException occurs when importing widget with zero width or height.


  • NullReferenceException is thrown when importing Widget without parent FormField.
  • ArgumentNullException is thrown when importing FormField with resources defined locally instead of defined in AcroForm object.
  • Field Name is modified when importing and exporting PDF with PdfFormatProvider.


  • Memory leak when editing or exporting a document containing a field in header or footer.
  • Words with apostrophes are considered invalid by the spell checker.
  • Memory leak when creating a deep copy of a section results in keeping a reference to multiple RadDocument instances.
  • Image property of FormattingColorPicker cannot be set when in external Data Template.
  • Arabic words are displayed out of order when containing specific Arabic characters.
  • Html format provider: Slow performance caused by handled KeyNotFoundException during import.


  • When both EnableSmallAppointmentRendering and ShowAllDayArea properties are set to true, an all-day Appointment with 0 duration is not rendered correctly.


  • Contracted negative forms are not recognized for TextBox and RichTextBox when the SpellCheckingMode is WordByWord.

UI for Silverlight


Next Steps

Launch demos

See UI for Silverlight in action.

Check pricing

Purchase individual products or any of the bundles.

Download Free Trial

With dedicated technical support.