Problems redrawing after change extend.

[DmitriyDatsko]

Smetimes after change exten(pan, zoom)  redrawing is not closed correctly. On the map remain part of old image. Map control contains tree layers(imageserver layer, tile layer and dynamic layer).
If after that switch on off layer map drawn again normally. Server ArcGIS 10 SP2,SP3, SDK SL 2.2.

[JenniferNery]

Can you share some code and steps to reproduce? I have not heard of this issue before. Are you saying layers had to be turned on/off visibility for the map to draw them correctly? To force a redraw, you can call layer.Refresh(). But it's best to identify the problem first, which of the 3 layers is causing the issue? Is it from a specific service? You can try to use Fiddler with your Silverlight app and compare the image received with the image drawn on the map.