dear Morten
i have watch your video Advance Development ARCGIS API MS SL/WPF
in which u have create esri bookmark tool for addin in the viewer
u have only used esri: bookmark and template with out binding it with the esri map
i have also try to used magnifying glass sample from interactive sample api
but with out binding esri map the tool does not work and if u bind it with esri map new esri map appears that is used less
i need code to understand how bookmark and magnifying glass can be work for my ARCGIS Viewer MAP as ur bookmark was working
need ur help
hope u will reply soon