My install of VS 2017 is up to date, and upon creating a new .NET Core 1.1 web app, with Identity (Individual user accounts) I get a slew of errors telling me that packages are incompatible. 
我安装的VS 2017是最新的，并且在使用身份（个人用户帐户）创建新的.NET Core 1.1 Web应用程序时，出现了很多错误，告诉我软件包不兼容。 It would appear to me that something is seriously broken in the tooling for Identity Core. 在我看来，Identity Core的工具中出现了一些严重问题。 No updates are available. 没有可用的更新。 I've tried changing to different "netstandard..." and "netcoreapp..." targets in the .csproj but it doesn't fix it. 我尝试在.csproj中更改为不同的“ netstandard ...”和“ netcoreapp ...”目标，但无法解决。
If I create a separate project without Identity, it restores and builds as expected. 如果我创建一个没有Identity的单独项目，它将按预期还原和生成。
Here's the full output with my test project: 这是我的测试项目的完整输出：
Error Package System.Text.Encoding.CodePages 4.3.0 is not compatible with netcoreapp1.1 (.NETCoreApp,Version=v1.1). 错误包System.Text.Encoding.CodePages 4.3.0与netcoreapp1.1（.NETCoreApp，Version = v1.1）不兼容。 Package System.Text.Encoding.CodePages 4.3.0 supports: - monoandroid10 (MonoAndroid,Version=v1.0) - monotouch10 (MonoTouch,Version=v1.0) - netstandard1.3 (.NETStandard,Version=v1.3) - xamarinios10 (Xamarin.iOS,Version=v1.0) - xamarinmac20 (Xamarin.Mac,Version=v2.0) - xamarintvos10 (Xamarin.TVOS,Version=v1.0) - xamarinwatchos10 (Xamarin.WatchOS,Version=v1.0) 软件包System.Text.Encoding.CodePages 4.3.0支持：-monoandroid10（MonoAndroid，版本= v1.0）-monotouch10（MonoTouch，版本= v1.0）-netstandard1.3（.NETStandard，Version = v1.3）- xamarinios10（Xamarin.iOS，版本= v1.0）-xamarinmac20（Xamarin.Mac，版本= v2.0）-xamarintvos10（Xamarin.TVOS，版本= v1.0）-xamarinwatchos10（Xamarin.WatchOS，版本= v1.0 ）
Error Package System.IO.Pipes 4.3.0 is not compatible with netcoreapp1.1 (.NETCoreApp,Version=v1.1). 错误软件包System.IO.Pipes 4.3.0与netcoreapp1.1（.NETCoreApp，Version = v1.1）不兼容。 Package System.IO.Pipes 4.3.0 supports: netstandard1.3 (.NETStandard,Version=v1.3) 软件包System.IO.Pipes 4.3.0支持：netstandard1.3（.NETStandard，Version = v1.3）
Error Package Microsoft.CodeAnalysis.Workspaces.Common 1.3.0 is not compatible with netcoreapp1.1 (.NETCoreApp,Version=v1.1). 错误包Microsoft.CodeAnalysis.Workspaces.Common 1.3.0与netcoreapp1.1（.NETCoreApp，Version = v1.1）不兼容。 Package Microsoft.CodeAnalysis.Workspaces.Common 1.3.0 supports: - net45 (.NETFramework,Version=v4.5) - netstandard1.3 (.NETStandard,Version=v1.3) - portable-net45+win8 (.NETPortable,Version=v0.0,Profile=Profile7) 软件包Microsoft.CodeAnalysis.Workspaces.Common 1.3.0支持：-net45（.NETFramework，Version = v4.5）-netstandard1.3（.NETStandard，Version = v1.3）-Portable-net45 + win8（.NETPortable，Version = V0.0，档案= Profile7）
Error One or more packages are incompatible with .NETCoreApp,Version=v1.1. 错误一个或多个软件包与.NETCoreApp，Version = v1.1不兼容。
Error Package Microsoft.CodeAnalysis.CSharp.Workspaces 1.3.0 is not compatible with netcoreapp1.1 (.NETCoreApp,Version=v1.1). 错误包Microsoft.CodeAnalysis.CSharp.Workspaces 1.3.0与netcoreapp1.1（.NETCoreApp，Version = v1.1）不兼容。 Package Microsoft.CodeAnalysis.CSharp.Workspaces 1.3.0 supports: - net45 (.NETFramework,Version=v4.5) - netstandard1.3 (.NETStandard,Version=v1.3) - portable-net45+win8 (.NETPortable,Version=v0.0,Profile=Profile7) 软件包Microsoft.CodeAnalysis.CSharp.Workspaces 1.3.0支持：-net45（.NETFramework，Version = v4.5）-netstandard1.3（.NETStandard，Version = v1.3）-Portable-net45 + win8（.NETPortable，Version = V0.0，档案= Profile7）
Error Package Microsoft.Composition 1.0.27 is not compatible with netcoreapp1.1 (.NETCoreApp,Version=v1.1). 错误包Microsoft.Composition 1.0.27与netcoreapp1.1（.NETCoreApp，Version = v1.1）不兼容。 Package Microsoft.Composition 1.0.27 supports: portable-net45+win8+wp8+wpa81 (.NETPortable,Version=v0.0,Profile=Profile259) 软件包Microsoft.Composition 1.0.27支持：Portable-net45 + win8 + wp8 + wpa81（.NETPortable，Version = v0.0，Profile = Profile259）
