Thank you your interest in the RadControls for Silverlight.
Current release of our controls are targeting the Silverlight 3.
About themes and our controls.
Yes our controls support themes and you can set a theme in a single place. More about theming in RadControls for Silverlight you can find in the links below:
Our controls support localization. Even more you can use our Localization Manager to localize your controls even the whole application. More information you can find in:
Please note the RTL is not supported - this is a limitation of the Silverlight framework.
Please do not hesitate to contact us if you have more questions.
the Telerik team