Visual Studio 在 Visual Studio For Mac 2022 上未使用正确的 .NET SDK

Question

I am attempting to upgrade a project from .net 5 to .net 6

I am using Visual Studio for Mac 2022 v17.3 (I have tried Visual Studio for Mac Preview 2022 v17.4 as well but no luck there)

I have installed the .net 6 sdk onto machine. The output of do.net --list-sdks is:

dotnet --list-sdks
2.2.100 [/usr/local/share/dotnet/sdk]
3.0.101 [/usr/local/share/dotnet/sdk]
3.1.301 [/usr/local/share/dotnet/sdk]
3.1.419 [/usr/local/share/dotnet/sdk]
3.1.422 [/usr/local/share/dotnet/sdk]
5.0.100 [/usr/local/share/dotnet/sdk]
5.0.408 [/usr/local/share/dotnet/sdk]
6.0.300 [/usr/local/share/dotnet/sdk]
6.0.400 [/usr/local/share/dotnet/sdk]

The output of do.net --version is:

dotnet --version
6.0.400

I have attempted both with and without a global.json. The contents of the global.json when I tried it:

{
  "sdk": {
    "version": "6.0.400"
  }
}

I also tried my other 6 sdk version,

{
  "sdk": {
    "version": "6.0.300"
  }
}

My TargetFramework for my projects is set to.net6.0

    <TargetFramework>net6.0</TargetFramework>

Despite all of this, here is the output when I attempt to build from Visual Studio: (building from command line works)

/usr/local/share/do.net/sdk/ 5.0.408 /Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(141,5): error.NETSDK1045: The current .NET SDK does not support targeting .NET 6.0. Either target .NET 5.0 or lower, or use a version of the .NET SDK that supports .NET 6.0.

(bold emphasis is my own, on the sdk version)

It is only ever trying to use 5.0.408

I know there are very many questions and answers related to this issue on stack overflow, one example of which is this question , the only problem is the solutions provided in the other similar questions are not resolving my issue. There seems to be some sort of caching happening and I cannot figure it out. I just want Visual Studio to use the proper SDK version.

If I run do.net build MySolution.sln from the command line, it builds using the proper SDK. Visual Studio, on the other hand, does not. It only uses 5.0.408. There is not a global.json anywhere in my file structure that points to a.net 5 sdk. There are no projects in my solution that Target 5, they all target 6.

Answer 1

I managed to workaround it by:

• removing 5.0.408 from my machine
• removing 6.0.400 from my machine
• downloading a fresh install of 5.0.408
• downloading a fresh install of 6.0.400

If this doesnt work, I found another solution which is to uncheck "Build with MSBuild on mono" in the solution build properties. (Right click solution file, go to properties, "Build > General", uncheck)

Answer 2

See if this documentation helps. Change TargetFramework VisualStudio . Visual Studio will try to build the project with the target framework you indicate.

Answer 3

I've tried to do like you but this doesn't work.

I've removed the SDK 5.0.408 and 6.0.401 like this:

version="5.0.408"
sudo rm -rf /usr/local/share/dotnet/sdk/$version
sudo rm -rf /usr/local/share/dotnet/shared/Microsoft.NETCore.App/$version
sudo rm -rf /usr/local/share/dotnet/shared/Microsoft.AspNetCore.All/$version
sudo rm -rf /usr/local/share/dotnet/shared/Microsoft.AspNetCore.App/$version
sudo rm -rf /usr/local/share/dotnet/host/fxr/$version

version="6.0.401"
sudo rm -rf /usr/local/share/dotnet/sdk/$version
sudo rm -rf /usr/local/share/dotnet/shared/Microsoft.NETCore.App/$version
sudo rm -rf /usr/local/share/dotnet/shared/Microsoft.AspNetCore.All/$version
sudo rm -rf /usr/local/share/dotnet/shared/Microsoft.AspNetCore.App/$version
sudo rm -rf /usr/local/share/dotnet/host/fxr/$version`

Then I've reinstalled the SDK 5.0.408 and 6.0.401.

But I always have the same error when I try to restore packages from Visual Studio.

Is there something else?

Answer 4

Inside of Visual Studio 2022 for Mac, I went to Tools, then SDK manager, and set this and it automatically detected the SDK after selecting this file: