Hi Rob,
you need to defin the Microsoft.Windows.Controls namespace at the begining of your page like that:
xmlns
:ms="clr-namespace:System.Windows.Controls;assembly=System.Windows"
and then yo use this prefix when using the ScrollViewer attached properties:
<
telerik:RadTreeView ms:ScrollViewer.HorizontalScrollBarVisibility="Visible" ...
Let us know if you have any other problems.
Greetings,
Valentin.Stoychev
the Telerik team
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