To allow viewing of rasters, we use a layer of type MultiGeoRasterLayer. (MultiGeoRasterLayer)
There is a slight white band between the rasters. (ie screen shot)
What is this?
Is there a way to remove this white band?
Yes. You can use layeringOverlay.TileCache = null to disable the cache. And the reason for the “white band”. Probably because the old dll generate some tile with the border. So you can either delete the old cache file or disable the cache as Don mentioned. Here is more detail.