Can't show nuget package that is packed by .net core

in VS2015 update 2 Nuget package manager,
it can't show the package that is built from .xproj (.net core project)

However, you still can install it from package manager console.

Product: ProGet
Version: 4.0.10

This likely has to do with framework targeting, which is very complicated and not well documented; in this case, please provide the exact queries that the NuGet Package Manager is using when talking to ProGet and NuGet.org, and what you'd expect the ProGet query to return; this will give us an idea of how we can adjust the queries as needed.

Nuget Package Manager version is 3.4.3.855.
It is interesting that it only can't show the package from xproj but it shows the rest of packages just fine.

And after I installed the package from NPM console, it shows up in installed tab.

Btw, how do I find out the exact queries ?

You can use Fiddler or Wireshark to capture HTTP traffic, and see what the contents /queries are.

I think I know why,

The query shows either targetFramework='unsupported' (for update2 xproj) or targetFramework='DNX451' (for update1 xproj)

I think it should use targetFramework='net451'