We have a BingMapsOverlay and we can set a TileCache property on the overlay. We create a new FileRasterTileCache and set it
And we can also see that several directories are created on disk. E.g 17/70039, 17/70040 and so forth in the folder we point to in FileRasterTileCache. But no tiles are written to disk only the directory structure are created.
It this because Bing does not allowed tiles to be cache locally?