Is it possible to add a vector tile in a .vtpk file with the Esri runtime in .NET as a feature layer where you could query your data.
Also, is their a website where I could download .vtpk file. I use to make some in ArcGIS pro, but could not use them in the runtime.
Thank you
You can use the vector tile package in Runtime, but it cannot be queried. It is just lines and labels, there is no data behind it (at least that is my understanding)
That is correct. It's optimized for being used as a basemap by stripping away anything not needed for rendering (including removing full geometry and attributes) and for fast rendering. You'd need a geodatabase used with a featurelayer to get the full info.
For acquiring a VTPK with ArcGIS Pro, you may find this of interest:
Using ArcGIS Pro to put Esri Vector Tile basemaps in your Mobile Map