refering to this post ,I know there is a way to download the tranlated files with node.js" How do I download SVG/SVF for offline viewing with Autodesk Model Forge APIs",and using the Model Derivative api "GET :urn/manifest/:derivativeurn", I can download all the files record in manifest, download files pic: http://imgur.com/iPFn3Cx
my question is :are these files I download from manifest with "GET :urn/manifest/:derivativeurn" enough for offline viewing? If not,did anyone implement this download method with C#?
Yes they are enough, the manifest allows you to download every resource from a viewable package. As already pointed out in the answer you can find more information and full code sample from the https://extract.autodesk.io project.
We don't have a .Net version of that code at the moment.