Dear Gurus!
I download and install ArcGIS Runtime SDK for WPF. I try to work with ArcGISWpfApplication1 template. When I try next xaml:
<esri:Map x:Name="MyMap" UseAcceleratedDisplay="True" Extent="3200000,8500000,4250000,10130000" >
<esri:OpenStreetMapLayer ID="OSMLayer" Style="Mapnik" />
</esri:Map>
all works fine. But when I try uncomment any other segment of code , I get error message

(This application works with a developer license. This license is valid only for development and test purposes). What I must to do ? How to get licence string and what else to do?
Thanks in advance!