无法降级 NuGet 包

Question

我有一个 .NET 6 项目，我想降级到 .NET 5，所以我将目标框架从 6 更改为 5。

<TargetFramework>net5.0</TargetFramework>

这样做之后，我得到了很多预期的包兼容性错误，例如：

Package Microsoft.EntityFrameworkCore.Tools 6.0.5 is not compatible with net5.0 (.NETCoreApp,Version=v5.0). Package Microsoft.EntityFrameworkCore.Tools 6.0.5 supports: net6.0 (.NETCoreApp,Version=v6.0) 

但是，当我尝试使用 NuGet 包管理器或包管理器控制台降级包时，我收到所有其他包的兼容性错误，并且包没有成功降级。好像我不能一个一个地降级每个包，不知何故我需要同时降级所有包。

输入：

Install-Package Microsoft.EntityFrameworkCore.Tools -Version 5.0.17

输出：

Install-Package : NU1202: Package Abp.AspNetCore.SignalR 7.2.1 is not compatible with net5.0 (.NETCoreApp,Version=v5.0). Package Abp.AspNetCore.SignalR 7.2.1 supports: net6.0 
(.NETCoreApp,Version=v6.0)
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore.Design -Version 5.0.17
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
 
Install-Package : NU1202: Package Microsoft.AspNetCore.Authentication.JwtBearer 6.0.5 is not compatible with net5.0 (.NETCoreApp,Version=v5.0). Package 
Microsoft.AspNetCore.Authentication.JwtBearer 6.0.5 supports: net6.0 (.NETCoreApp,Version=v6.0)
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore.Design -Version 5.0.17
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
 
Install-Package : NU1202: Package Microsoft.EntityFrameworkCore.SqlServer 6.0.5 is not compatible with net5.0 (.NETCoreApp,Version=v5.0). Package Microsoft.EntityFrameworkCore.SqlServer 6.0.5 
supports: net6.0 (.NETCoreApp,Version=v6.0)
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore.Design -Version 5.0.17
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
 
Install-Package : NU1202: Package Microsoft.EntityFrameworkCore 6.0.5 is not compatible with net5.0 (.NETCoreApp,Version=v5.0). Package Microsoft.EntityFrameworkCore 6.0.5 supports: net6.0 
(.NETCoreApp,Version=v6.0)
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore.Design -Version 5.0.17
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
 
Install-Package : NU1202: Package Owl.reCAPTCHA 0.5.0 is not compatible with net5.0 (.NETCoreApp,Version=v5.0). Package Owl.reCAPTCHA 0.5.0 supports: net6.0 (.NETCoreApp,Version=v6.0)
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore.Design -Version 5.0.17
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
 
Install-Package : Package restore failed. Rolling back package changes for 'ATC.Web.Host'.
At line:1 char:1
+ Install-Package Microsoft.EntityFrameworkCore.Design -Version 5.0.17
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand
 

Answer 1

升级某些软件包时，我遇到了类似的问题。我进入项目文件并手动编辑版本号。