I want to implement an event similar to taggin a photo in wpf. Wht functionality should i use to mark a certain area of an image in order to tag it.

thakx in advance.

ps: i have tried

            <pres:RadTransitionControl.ContentTemplate>  
                <HierarchicalDataTemplate>
                 </HierarchicalDataTemplate>
            </pres:RadTransitionControl.ContentTemplate>

and

           <Image></Image>

but those dont support that fuctionality

Have posted it in expression blend forum? There are some wpf silverlight experts. U may get some help from them