Hi

if i set the Silverlight Tab Control to TabOrientation="Vertical" at design time the application errors with a system.NullExceptionReference. But if i change the TabOrientaion after the application has loaded i do not get an error.

Also if i change TabOrientation="Vertical" in the page load event i also get the error.

Am i missing something.

Regards,

Hi Richard,

You are not missing anything. This is a strange issue indeed. We did some local tests and we achieved the same results. We will investigate what is causing the problem and we will try to fix it right away.
For the time being, you can set the orientation in xaml, like TabOrientation= "Vertical" , or you can add Loaded event to the parent (Page or User Control) and use it to make TabControl vertical.
 
Sincerely yours,
Boyan
the Telerik team