I am using Runtime SDK 100.4 and .net platform.
I want to add layers in the .ncz file(netCAD file) to the basemap. How can I do that? Or Should I convert .ncz file to another files?
NetCAD (.ncz) files are not currently supported by ArcGIS Runtime or as far as i can tell in ArcGIS generally.
For supported types in Runtime see: Layers and tables—ArcGIS Runtime SDK for .NET | ArcGIS for Developers. Basemaps in ArcGIS Runtime are typically Vector Tile Packages (.vtpk) or raster Tile Packages (.tpk).
Additional workflow you could consider is exporting the data to a format support by ArcGIS Pro (Supported data types and items—ArcGIS Pro | ArcGIS Desktop) and then creating a Mobile Map Package for use in ArcGIS Runtime, or a vector tile package / raster tile package.
Retrieving data ...