无法安装和使用Specflow

Question

我在家里的PC上安装了Specflow。它在我工作的PC上完美运行。

安装Specflow后我在家里收到此错误：

警告引用ActivityLog.xml。这是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>

我怎样才能解决这个问题？我花了很长时间谷歌搜索。例如，我看过这里：specflow disabled, SpecflowPackagePackage didnt load correctly

Answer 1

请看一下这个问题：https://github.com/techtalk/SpecFlow/issues/1049

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