问题描述
在全新安装了Windows 10以及最新的Visual Studio 2015，netcore和nuget工具之后，我无法再将Nuget软件包安装到任何.netstandard项目中。下面是一些示例输出：
After doing a fresh Windows 10 installation along with latest Visual Studio 2015, netcore, and nuget tooling - I can no longer install Nuget packages to any .netstandard projects. Here's some example output:
Restoring packages for 'ClassLibrary1'. Restoring packages for c:\users\zone1\documents\visual studio 2015\Projects\ClassLibrary1\ClassLibrary1\project.json... Package System.ComponentModel.EventBasedAsync 4.0.11 is not compatible with netstandard1.3 (.NETStandard,Version=v1.3). Package System.ComponentModel.EventBasedAsync 4.0.11 supports: - monoandroid10 (MonoAndroid,Version=v1.0) - monotouch10 (MonoTouch,Version=v1.0) - net45 (.NETFramework,Version=v4.5) - netcore50 (.NETCore,Version=v5.0) - netstandard1.0 (.NETStandard,Version=v1.0) - netstandard1.3 (.NETStandard,Version=v1.3) - portable-net45+win8+wp8+wpa81 (.NETPortable,Version=v0.0,Profile=Profile259) - win8 (Windows,Version=v8.0) - wp8 (WindowsPhone,Version=v8.0) - wpa81 (WindowsPhoneApp,Version=v8.1) - xamarinios10 (Xamarin.iOS,Version=v1.0) - xamarinmac20 (Xamarin.Mac,Version=v2.0) - xamarintvos10 (Xamarin.TVOS,Version=v1.0) - xamarinwatchos10 (Xamarin.WatchOS,Version=v1.0) One or more packages are incompatible with .NETStandard,Version=v1.3. Package restore failed for 'ClassLibrary1'.
我将项目ClassLibrary1创建为可移植类库，将目标更改为netstandard1.3，但无法安装任何显示对netstandard1.3支持的Nuget软件包。同样，netstandard1.5和其他版本也是如此。
I created the project ClassLibrary1 as a portable class library, change the target to netstandard1.3, and cannot install any Nuget packages that show support for netstandard1.3. Same goes for netstandard1.5 and the other versions.
我只是尝试为（一个支持.netstandard的项目），以验证我的项目设置是否正确，并遇到了相同的问题：
I just trying pulling and building the source for MailKit (a project that supports .netstandard) to verify I wasn't setting up my project wrong and am getting the same problem:
Errors in C:\Users\zone1\Repos\MailKit\MailKit\MailKit.CoreFX.xproj
Package System.Net.NetworkInformation 4.1.0 is not compatible with netstandard1.3 (.NETStandard,Version=v1.3). Package System.Net.NetworkInformation 4.1.0 supports:
- monoandroid10 (MonoAndroid,Version=v1.0)
- monotouch10 (MonoTouch,Version=v1.0)
- net45 (.NETFramework,Version=v4.5)
- netcore50 (.NETCore,Version=v5.0)
- netstandard1.0 (.NETStandard,Version=v1.0)
- netstandard1.3 (.NETStandard,Version=v1.3)
- portable-net45+win8+wp8+wpa81 (.NETPortable,Version=v0.0,Profile=Profile259)
- win8 (Windows,Version=v8.0)
- wp8 (WindowsPhone,Version=v8.0)
- wpa81 (WindowsPhoneApp,Version=v8.1)
- xamarinios10 (Xamarin.iOS,Version=v1.0)
- xamarinmac20 (Xamarin.Mac,Version=v2.0)
- xamarintvos10 (Xamarin.TVOS,Version=v1.0)
- xamarinwatchos10 (Xamarin.WatchOS,Version=v1.0)
One or more packages are incompatible with .NETStandard,Version=v1.3.
我在此处发布了更多详细信息：
I've posted some more details here: https://github.com/NuGet/Home/issues/3433
在重新格式化之前，所有这些都有效全新安装的Windows。我想念什么吗？
This all worked before I reformatted with a fresh Windows installation. Am I missing something?
推荐答案
感谢。
从此处（）
然后运行：
nuget.exe当地-清除所有
我确保已关闭VS并删除了所有现有的project.lock.json文件。现在一切似乎都按预期工作。
I made sure to have VS closed and deleted any existing project.lock.json files. Now everything seems to work as intended.
我发现这个问题是在任何全新安装Windows / VS / tooling的系统上发生的，因此很可能是安装程序存在错误。
I found this problem to occur on any system with a fresh installation of Windows/VS/tooling so likely a bug with their installers.
这篇关于无法为netstandard1.x项目安装Netstandard1.x Nuget软件包的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！