找到 Microsoft.NETCore.App 5.0.0 时未找到框架 'Microsoft.NETCore.App'，版本“5”

Question

当我使用 dotnet 命令时遇到问题

> dotnet Mydll.dll
It was not possible to find any compatible framework version
The framework 'Microsoft.NETCore.App', version '5' was not found.
  - The following frameworks were found:
      2.1.23 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      2.2.7 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      2.2.8 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      3.0.3 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      3.1.4 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      3.1.9 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      3.1.10 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      5.0.0 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
      5.0.7 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

You can resolve the problem by installing the specified framework and/or SDK.

The specified framework can be found at:
  - https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=5&arch=x64&rid=win10-x64

我有点惊讶，因为我似乎安装了运行时 Microsoft.NETCore.App 5.0.0 和 5.0.7

>dotnet --list-runtimes

Microsoft.AspNetCore.All 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.23 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

为了确定，我已经安装了 ASP.NET Core Runtime 5.0.7 的托管包，但问题仍然存在

您知道问题是什么以及如何解决吗？

Answer 1

全局卸载已弃用的软件包：-

dotnet tool uninstall dotnet-ef -g

然后尝试重新安装最新的软件包版本：-

dotnet tool install --global dotnet-ef --version 5.0.1

如果不行，尝试第二个过程：-

那么您已经安装了 .Net 5。

下载 dotnet-sdk-5.0.301-win-x64.zip 并将 Microsoft.AspNetCore.App.0.301 文件夹从 zip 文件手动复制到 C:\ProgramFiles\dotnet\shared\Microsoft.AspNetCore.App.0.301

然后希望 asp.net 核心应用程序开始工作。

Answer 2

我遇到了同样的问题。

我手动将以下行添加到 .csproj 文件中：

<ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
</ItemGroup>

找到 Microsoft.NETCore.App 5.0.0 时未找到框架 'Microsoft.NETCore.App'，版本“5”

The framework 'Microsoft.NETCore.App', version '5' was not found while Microsoft.NETCore.App 5.0.0 is found

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