Xamarin格式UWP未能引用NuGet软件包系统参考

Question

我正在尝试添加一个自制的NuGet包，它是用VisualStudio2017自动构建到一个UWP Xamarin窗体项目中的。

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但是，当我尝试将包添加到UWP包(在VS2017包管理器中)时，它失败了。

Restoring packages for C:\Development\MyMobile\JobApp\JobApp\JobApp.UWP\project.json...
System.Threading.ThreadPool 4.3.0 provides a compile-time reference assembly for System.Threading.ThreadPool on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-arm.
System.Threading.Thread 4.3.0 provides a compile-time reference assembly for System.Threading.Thread on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-arm.
System.Diagnostics.Process 4.3.0 provides a compile-time reference assembly for System.Diagnostics.Process on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-arm.
One or more packages are incompatible with UAP,Version=v10.0 (win10-arm).
System.Threading.ThreadPool 4.3.0 provides a compile-time reference assembly for System.Threading.ThreadPool on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-arm-aot.
System.Threading.Thread 4.3.0 provides a compile-time reference assembly for System.Threading.Thread on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-arm-aot.
System.Diagnostics.Process 4.3.0 provides a compile-time reference assembly for System.Diagnostics.Process on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-arm-aot.
One or more packages are incompatible with UAP,Version=v10.0 (win10-arm-aot).
System.Threading.ThreadPool 4.3.0 provides a compile-time reference assembly for System.Threading.ThreadPool on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x64.
System.Threading.Thread 4.3.0 provides a compile-time reference assembly for System.Threading.Thread on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x64.
System.Diagnostics.Process 4.3.0 provides a compile-time reference assembly for System.Diagnostics.Process on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x64.
One or more packages are incompatible with UAP,Version=v10.0 (win10-x64).
System.Threading.ThreadPool 4.3.0 provides a compile-time reference assembly for System.Threading.ThreadPool on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x64-aot.
System.Threading.Thread 4.3.0 provides a compile-time reference assembly for System.Threading.Thread on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x64-aot.
System.Diagnostics.Process 4.3.0 provides a compile-time reference assembly for System.Diagnostics.Process on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x64-aot.
One or more packages are incompatible with UAP,Version=v10.0 (win10-x64-aot).
System.Threading.ThreadPool 4.3.0 provides a compile-time reference assembly for System.Threading.ThreadPool on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x86.
System.Threading.Thread 4.3.0 provides a compile-time reference assembly for System.Threading.Thread on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x86.
System.Diagnostics.Process 4.3.0 provides a compile-time reference assembly for System.Diagnostics.Process on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x86.
One or more packages are incompatible with UAP,Version=v10.0 (win10-x86).
System.Threading.ThreadPool 4.3.0 provides a compile-time reference assembly for System.Threading.ThreadPool on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x86-aot.
System.Threading.Thread 4.3.0 provides a compile-time reference assembly for System.Threading.Thread on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x86-aot.
System.Diagnostics.Process 4.3.0 provides a compile-time reference assembly for System.Diagnostics.Process on UAP,Version=v10.0, but there is no run-time assembly compatible with win10-x86-aot.
One or more packages are incompatible with UAP,Version=v10.0 (win10-x86-aot).
Package restore failed. Rolling back package changes for 'JobApp.UWP'.
Time Elapsed: 00:00:02.8217814
========== Finished ==========

我已经为UWP项目编辑了project.json，尝试并添加netstandard1.6 1.6和System.*依赖项，但遗憾的是，没有奏效。

{
  "dependencies": {
    "Microsoft.NETCore.UniversalWindowsPlatform": "5.3.3",
    "MvvmLight": "5.3.0",
    "Newtonsoft.Json": "10.0.2",
    "Xamarin.Forms": "2.3.4.231",
    "System.Threading": "4.3.0",
    "System.Runtime": "4.3.0",
    "System.Diagnostics.Process": "4.3.0",
    "System.Threading.Thread": "4.3.0",
    "System.Threading.ThreadPool": "4.3.0"
  },
  "frameworks": {
    "uap10.0": {
      "imports": "netstandard1.6"
    }
  },
  "runtimes": {
    "win10-arm": {},
    "win10-arm-aot": {},
    "win10-x86": {},
    "win10-x86-aot": {},
    "win10-x64": {},
    "win10-x64-aot": {}
  }
}

为什么UWP在系统上有问题。*引用？

这是我的包裹的NuSpec；

<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
    <metadata>
        <id>MyCommon</id>
        <version>1.0.131</version>
        <requireLicenseAcceptance>false</requireLicenseAcceptance>
        <dependencies>
            <group targetFramework=".NETFramework4.6">
                <dependency id="Quartz" version="3.0.0-alpha2" exclude="Build,Analyzers" />
                <dependency id="ImageSharp" version="1.0.0-alpha5-00046" exclude="Build,Analyzers" />
                <dependency id="System.ComponentModel" version="4.3.0" exclude="Build,Analyzers" />
            </group>
            <group targetFramework=".NETStandard1.6">
                <dependency id="Quartz" version="3.0.0-alpha2" exclude="Build,Analyzers" />
                <dependency id="NETStandard.Library" version="1.6.1" exclude="Build,Analyzers" />
                <dependency id="ImageSharp" version="1.0.0-alpha5-00046" exclude="Build,Analyzers" />
                <dependency id="System.ComponentModel" version="4.3.0" exclude="Build,Analyzers" />
            </group>
        </dependencies>
    </metadata>
</package>

Answer 1

您的NuGet包引用的是Quartz 3.0.0-alpha2，它引用System.Threading.Thread和System.Threading.ThreadPool。

这两个包(System.Threading.Thread和System.Threading.ThreadPool)在通用Windows平台上不受支持，至少目前不支持。

这里，Immo ( .NET团队的项目经理)说：

• UWP目前只支持.NET标准1.4
• 我们的目标是最终扩展UWP以实现.NET标准2.0。一旦发生这种情况，UWP也将支持Thread。

下面是一些GitHub问题，您可以在这里更多地阅读有关此主题的内容：

• quartznet - Windows 10项目支持，
• 应该支持所有运行时，
• 在.NET标准中？，和
• 一个拉请求，它表示他们正在进行UWP对System.Threading.Thread的支持。