C# 无法安装和使用Specflow

我在家里的电脑上安装了Specflow。它在我的工作电脑上工作得非常好

安装Specflow后，我在家中遇到此错误：

警告引用了ActivityLog.xml。下面是ActivityLog.xml所说的：

<entry>
    <record>518</record>
    <time>2018/02/28 07:40:02.966</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>LegacySitePackage failed for package [SpecFlowPackagePackage]Source: &apos;Microsoft.VisualStudio.Composition&apos; Description: Expected 1 export(s) with contract name &quot;TechTalk.SpecFlow.VsIntegration.LanguageService.IGherkinLanguageServiceFactory&quot; but found 0 after applying applicable constraints.&#x000D;&#x000A;Microsoft.VisualStudio.Composition.CompositionFailedException: Expected 1 export(s) with contract name &quot;TechTalk.SpecFlow.VsIntegration.LanguageService.IGherkinLanguageServiceFactory&quot; but found 0 after applying applicable constraints.&#x000D;&#x000A;   at Microsoft.VisualStudio.Composition.ExportProvider.GetExports(ImportDefinition importDefinition)&#x000D;&#x000A;   at Microsoft.VisualStudio.Composition.ExportProvider.GetExports[T,TMetadataView](String contractName, ImportCardinality cardinality)&#x000D;&#x000A;   at Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T,TMetadataView](String contractName)&#x000D;&#x000A;   at Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T](String contractName)&#x000D;&#x000A;   at Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T]()&#x000D;&#x000A;   at Microsoft.VisualStudio.Composition.ExportProvider.GetExportedValue[T]()&#x000D;&#x000A;   at Microsoft.VisualStudio.ComponentModelHost.ComponentModel.GetService[T]()&#x000D;&#x000A;   at TechTalk.SpecFlow.VsIntegration.Utils.VsxHelper.ResolveMefDependency[T](IServiceProvider serviceProvider)&#x000D;&#x000A;   at TechTalk.SpecFlow.VsIntegration.DefaultDependencyProvider.RegisterVsDependencies(IObjectContainer container, IServiceProvider serviceProvider)&#x000D;&#x000A;   at TechTalk.SpecFlow.VsIntegration.DefaultDependencyProvider.RegisterDefaults(IObjectContainer container)&#x000D;&#x000A;   at TechTalk.SpecFlow.VsIntegration.VsContainerBuilder.RegisterDefaults(IObjectContainer container)&#x000D;&#x000A;   at TechTalk.SpecFlow.VsIntegration.VsContainerBuilder.CreateContainer(SpecFlowPackagePackage package)&#x000D;&#x000A;   at TechTalk.SpecFlow.VsIntegration.SpecFlowPackagePackage.Initialize()&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.Package.Microsoft.VisualStudio.Shell.Interop.IVsPackage.SetSite(IServiceProvider sp)</description>
    <guid>{5D978B7F-8F91-41C1-B7BA-0B4C056118E8}</guid>
    <hr>80131500</hr>
    <errorinfo></errorinfo>
  </entry>

518
2018/02/28 07:40:02.966
错误
VisualStudio
程序包[SpecFlowPackagePackage]的LegacySitePackage失败源：&apos；Microsoft.VisualStudio.Composition&apos；描述：合同名称为“TechTalk.SpecFlow.VsIntegration.LanguageService.IGherkinLanguageServiceFactory”的导出应为1个，但在应用适用约束后找到0个
；Microsoft.VisualStudio.Composition.CompositionFailedException:合同名为“TechTalk.SpecFlow.VsIntegration.LanguageService.IGherkinLanguageServiceFactory”的导出应为1个，但在应用适用的约束后找到0个
；在Microsoft.VisualStudio.Composition.ExportProvider.GetExports（导入定义导入定义）和#x000D
；在Microsoft.VisualStudio.Composition.ExportProvider.GetExports[T，TMetadataView]（字符串合同名称，导入坐标基数）和#x000D
；在Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T，TMetadataView]（String contractName）和#x000D
；在Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T]（字符串合同名称）和#x000D
；在Microsoft.VisualStudio.Composition.ExportProvider.GetExport[T]（）
；在Microsoft.VisualStudio.Composition.ExportProvider.GetExportedValue[T]（）
；在Microsoft.VisualStudio.ComponentModelHost.ComponentModel.GetService[T]（）
；在TechTalk.SpecFlow.VsIntegration.Utils.VsxHelper.ResolveMefDependency[T]（IServiceProvider服务提供商）和35; x000D
；在TechTalk.SpecFlow.VsIntegration.DefaultDependencyProvider.RegisterVsDependencies（IObjectContainer容器、IServiceProvider服务提供商）和#x000D
；在TechTalk.SpecFlow.VsIntegration.DefaultDependencyProvider.RegisterDefaults（IObjectContainer）和#x000D
；在TechTalk.SpecFlow.VsIntegration.VsContainerBuilder.RegisterDefaults（IOObjectContainer容器）和x000D
；在TechTalk.SpecFlow.VsIntegration.VsContainerBuilder.CreateContainer（SpecFlowPackagePackage）和x000D
；位于TechTalk.SpecFlow.VsIntegration.SpecFlowPackagePackage.Initialize（）
；在Microsoft.VisualStudio.Shell.Package.Microsoft.VisualStudio.Shell.Interop.IVsPackage.SetSite（IServiceProvider sp）上
{5D978B7F-8F91-41C1-B7BA-0B4C056118E8}
80131500

---

我怎样才能解决这个问题？我花了很长时间在谷歌上搜索。例如，我在这里查看：

请查看此问题：

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tl；dr：清理Visual Studio的MEF缓存并更新至VS 2017的最新版本。

谢谢。那是行不通的。然而，将Visual studio升级到最新的Visual studio subversion确实按照我认为是您在Github上发布的帖子（我没有该帖子的链接）工作。另外，请注意，我在我的原始帖子中发布了您的链接。我现在感到困惑。它现在对你有用吗？如果是，什么有帮助？很抱歉造成混乱。您在Github上的帖子帮助解决了这个问题，即将Visual Studio升级到最新版本。您在此网页上的帖子没有帮助。这有意义吗？嗯，这里的帖子是对GitHub问题的总结。