我在ASP.NET MVC5项目（Powershell v5和Visual Studio 2015）上运行Enable-Migrations时出现以下错误。我试图卸载并重新安装EntityFramework（v6.1.3），但没有幸运。有谁知道如何解决它？
类型名称'Microsoft.VisualStudio.Shell.Package'不明确，可能是'Microsoft.VisualStudio.Shell.Package，Microsoft.VisualStudio.Shell.14.0，Version = 14.0.0.0，Culture = neutral，PublicKeyToken = b03f5f7f11d50a3a'或' Microsoft.VisualStudio.Shell.Package，Microsoft.VisualStudio.Shell.11.0，Version = 14.0.0.0，Culture = neutral，PublicKeyToken = b03f5f7f11d50a3a'。在C：\ PROGRAM FILES（X86）\ MICROSOFT VISUAL STUDIO 14.0 \ COMMON7 \ IDE \ EXTENSIONS \ MSHGPU2S.W4I \ Modules \ NuGet \ profile.ps1：126 char：5 + $ service = [Microsoft.VisualStudio.Shell.Package] :: GetGlobalServi ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo：InvalidArgument：（:) []，RuntimeException + FullyQualifiedErrorId：AmbiguousTypeReference
类型名称'NuGet.VisualStudio.IVsPackageInstallerServices'不明确，可能是'NuGet.VisualStudio.IVsPackageInstallerServices，Microsoft.VisualStudio.ApplicationInsights，Version = 4.0.0.0，Culture = neutral，PublicKeyToken = b03f5f7f11d50a3a'或'NuGet.VisualStudio.IVsPackageInstallerServices， Microsoft.VisualStudio.Web.Application，Version = 14.0.0.0，Culture = neutral，PublicKeyToken = b03f5f7f11d50a3a'。在D：\ xxx \ packages \ EntityFramework.6.1.3 \ tools \ EntityFramework.psm1：1004 char：5 + $ packageInstallerServices = $ componentModel.GetService（[NuGet.Vis ... + ~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~ + CategoryInfo：InvalidArgument：（:) []，RuntimeException + FullyQualifiedErrorId：AmbiguousTypeReference
您无法在空值表达式上调用方法。在D：\ xxx \ packages \ EntityFramework.6.1.3 \ tools \ EntityFramework.psm1：1006 char：5 + $ vsPackage = $ packageInstallerServices.GetInstalledPackages（）| ？ ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~ + CategoryInfo：InvalidOperation :( :) []，RuntimeException + FullyQualifiedErrorId：InvokeMethodOnNull
Join-Path：无法将参数绑定到参数'Path'，因为它为null。在D：\ xxx \ packages \ EntityFramework.6.1.3 \ tools \ EntityFramework.psm1：713 char：28 + $ toolsPath = Join-Path $ installPath tools + ~~~~~~~~~~~~ + CategoryInfo： InvalidData：（:) [Join-Path]，ParameterBindingValidationException + FullyQualifiedErrorId：ParameterArgumentValidationErrorNullNotAllowed，Microsoft.PowerShell.Commands.JoinPathCommand
Join-Path：无法将参数绑定到参数'Path'，因为它为null。在D：\ xxx \ packages \ EntityFramework.6.1.3 \ tools \ EntityFramework.psm1：780 char：74 + ... [System.Reflection.Assembly] :: LoadFrom（（Join-Path $ ToolsPath EntityF ... + ~~~~~~~~~~ + CategoryInfo：InvalidData :( :) [Join-Path]，ParameterBindingValidationException + FullyQualifiedErrorId：ParameterArgumentValidationErrorNullNotAllowed，Microsoft.PowerShell.Commands.JoinPathCommand
您无法在空值表达式上调用方法。在D：\ xxx \ packages \ EntityFramework.6.1.3 \ tools \ EntityFramework.psm1：781 char：5 + $ dispatcher = $ utilityAssembly.CreateInstance（+ ~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo：InvalidOperation :( :) []，RuntimeException + FullyQualifiedErrorId：InvokeMethodOnNull
Join-Path：无法将参数绑定到参数'Path'，因为它为null。在D：\ xxx \ packages \ EntityFramework.6.1.3 \ tools \ EntityFramework.psm1：810 char：20 +（Join-Path $ runner.ToolsPath EntityFramework.PowerShell.dll），+ ~~~~~~~~~ ~~~~~~~~ + CategoryInfo：InvalidData :( :) [Join-Path]，ParameterBindingValidationException + FullyQualifiedErrorId：ParameterArgumentValidationErrorNullNotAllowed，Microsoft.PowerShell.Commands.JoinPathCommand
如果您有11099到14257之间的任何Windows 10 Insider预览版本，则这是一个已知错误