netcoreapp2.0 with netstandard2.0
.NET Core 2.0 will require the .NET Core 2.0 SDK. Download links to nightlies are available here: https://github.com/dotnet/cli/tree/master#installers-and-binaries
Heads up: nightly builds of this are very unstable right now. As of February 2017, .NET Core 2.0 has no public release. Checkout https://github.com/dotnet/corefx/blob/master/Documentation/project-docs/dogfooding.md for instructions on using nightlies.
.NET Core 2.0 SDK (final release) is available including tools for vs 2017 /2015.
You can download and it's integrated with vs 2017.3
Note that if you installed this version: dotnet-sdk-2.0.0-win-gs-x64, it didn't show in visual studio 2017.3,ref
For feature details read: Announcing .NET Core 2.0
Also, ASP.NET Core 2.0 is available