之前从未遇到过这个问题,但今天运行命令Install-Package Microsoft.EntityFrameworkCore
时,出现了以下错误:
NU1107: Version conflict detected for Microsoft.EntityFrameworkCore.Abstractions. Install/reference Microsoft.EntityFrameworkCore.Abstractions 2.2.1 directly to
project WebApplication1 to resolve this issue.
WebApplication1 -> Microsoft.EntityFrameworkCore 2.2.1 -> Microsoft.EntityFrameworkCore.Abstractions (>= 2.2.1)
WebApplication1 -> Microsoft.AspNetCore.App 2.1.1 -> Microsoft.EntityFrameworkCore.Abstractions (>= 2.1.1 && < 2.2.0).
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Install-Package], Exception
+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
Install-Package : Package restore failed. Rolling back package changes for 'WebApplication1'.
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Install-Package], Exception
+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
我真的不太确定该如何解决它。
我尝试安装以前的版本,但没有成功:Install-Package Microsoft.EntityFrameworkCore -Version 2.1.0
Microsoft.AspNetCore.App
元包,那么为什么你还需要单独安装Microsoft.EntityFrameworkCore
呢?因为你的Microsoft.AspNetCore.App
已经包含了所需版本的Microsoft.EntityFrameworkCore
。 - TanvirArjelMicrosoft.AspNetCore.App
包更新到 v2.2。 - Ivan Stoev