NuGet包：无法加载文件或程序集'System.Runtime，Version = 4.0.10.0'

Question

NuGet似乎存在一个问题，导致我无法为面向Windows 8.1和Windows Phone 8.1（Profile32）的可移植类库（PCL）生成包。

NuGet版本：2.8.60318.667

我的目录包含一个.csproj文件和一个提供元数据的随附.nuspec。

<?xml version="1.0"?>
<package>
  <metadata>
    <id>$id$</id>
    <version>$version$</version>
    <title>$title$</title>
    <authors>$author$</authors>
    <owners>$author$</owners>
    <licenseUrl>https://raw.githubusercontent.com/StevenLiekens/HTTPortable/master/LICENSE</licenseUrl>
    <projectUrl>https://github.com/StevenLiekens/HTTPortable</projectUrl>
    <requireLicenseAcceptance>false</requireLicenseAcceptance>
    <description>$description$</description>
    <releaseNotes></releaseNotes>
    <copyright>The MIT License (MIT)</copyright>
    <tags></tags>
  </metadata>
</package>

当我在该目录中运行nuget.exe pack时，程序崩溃并出现错误。

  

＆GT; nuget pack

Attempting to build package from 'HTTPortable.Tcp.WinRT.csproj'.
Packing files from 'D:\src\HTTPortable\src\HTTPortable.Tcp.WinRT\src\bin\Debug'.
WARNING: Unable to extract metadata from 'HTTPortable.Tcp.WinRT.dll'.
Using 'HTTPortable.Tcp.WinRT.nuspec' for metadata.
The replacement token 'title' has no value.

详细的日志记录显示nuget.exe正在尝试加载一个不存在的程序集。

  

＆GT; nuget pack / verbosity详解

WARNING: Unable to extract metadata from 'HTTPortable.Tcp.WinRT.dll'.
WARNING: System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=4.0.10.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
File name: 'System.Runtime, Version=4.0.10.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' ---> System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=4.0.10.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
File name: 'System.Runtime, Version=4.0.10.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
   at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection)
   at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
   at System.Reflection.Assembly.ReflectionOnlyLoad(String assemblyString)
   at NuGet.AssemblyMetadataExtractor.MetadataExtractor.AssemblyResolver.ReflectionOnlyAssemblyResolve(Object sender, ResolveEventArgs args)
   at System.AppDomain.OnReflectionOnlyAssemblyResolveEvent(RuntimeAssembly assembly, String assemblyFullName)

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

   at System.ModuleHandle.ResolveMethod(RuntimeModule module, Int32 methodToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount)
   at System.ModuleHandle.ResolveMethodHandleInternalCore(RuntimeModule module, Int32 methodToken, IntPtr[] typeInstantiationContext, Int32 typeInstCount, IntPtr[] methodInstantiationContext, Int32 methodInstCount)
   at System.ModuleHandle.ResolveMethodHandleInternal(RuntimeModule module, Int32 methodToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
   at System.Reflection.CustomAttributeData..ctor(RuntimeModule scope, CustomAttributeRecord caRecord)
   at System.Reflection.CustomAttributeData.GetCustomAttributes(RuntimeModule module, Int32 tkTarget)
   at System.Reflection.CustomAttributeData.GetCustomAttributesInternal(RuntimeAssembly target)
   at System.Reflection.RuntimeAssembly.GetCustomAttributesData()
   at System.Reflection.CustomAttributeData.GetCustomAttributes(Assembly target)
   at NuGet.AssemblyMetadataExtractor.MetadataExtractor.GetMetadata(String path)
   at NuGet.AssemblyMetadataExtractor.MetadataExtractor.GetMetadata(String path)
   at NuGet.AssemblyMetadataExtractor.GetMetadata(String assemblyPath)
   at NuGet.AssemblyMetadataExtractor.ExtractMetadata(PackageBuilder builder, String assemblyPath)
   at NuGet.Commands.ProjectFactory.CreateBuilder(String basePath)

这对任何人来说都很熟悉吗？