I added to the WebMap ImageServer layer, which works fine. However this WebMap and layer doesn't work in the .NET application.
Comparison shown that ArcGIS Online sends requests to ImageServer without specified format for exportImage operation. When this Raster layer is used in .NET app format is here: format=lerc&lercVersion=2 which seems causes the problems (both from WebMap and created manually).
Is it possible to specify format of exported images in .NET Runtime SDK for RasterLayer? Is it possible to specify it also in ArcGIS Online WebMap?
ArcGIS Runtime SDK 100.8
