Hi, I'm trying to dynamicly update the language of a Silverlight application. I tried the example provided by Tim Heuer and that was exactly wat I needed. Silverlight and localizing string data Now I'm experimenting with Data Annotations and would like to have the same behaviour.But with no luck... Can someone point me in the right direction. DataAnnotation of a property: [Display(Name = "UserNameLabel", ResourceType = typeof(Resources.Strings.StringResources))] [Required] public string Username ... My Xaml: <dataInput:Label Target="{Binding ElementName=tbUserName}" PropertyPath="UserName"/> Thanks, Ron