It is quite easy to add transient objects like a polyline or circle. But a RasterImage is a reference to a RasterImageDef. So if I want to add a transient bitmap as a RasterImage, I first have to add the RasterImageDef to the dictionary.
Is it possible to show a transient bitmap without adding it to the dictionary first? I want to load several images from a wmts service and replace them while zooming. I rather not constantly load and unload RasterImageDefs. I also can't find examples about RasterImages as transient object.
Or can I add a RasterImageDef also as a transient object?