Visual Studio 找不到最新安装的 .NET SDK

Question

I downloaded a project from Github with its Target Framework netcoreapp3.1 . After building it, an error stating that

The current .NET SDK does not support targeting .NET Core 3.1. Either target .NET Core 2.2 or lower, or use a version of the .NET SDK that supports .NET Core 3.1.

Hence, I downloaded and installed dotnet-sdk-3.1.300-win-x64 and now my SDK list is the following:

dotnet --list-sdks
2.1.602 [C:\Program Files\dotnet\sdk]
2.1.700 [C:\Program Files\dotnet\sdk]
2.1.801 [C:\Program Files\dotnet\sdk]
2.2.401 [C:\Program Files\dotnet\sdk]
3.1.300 [C:\Program Files\dotnet\sdk]

In the environment variables, I added a new variable for the Path User variables pointing to C:\Program Files\dotnet\ .

However, Visual Studio still outputs the same error in regards to the .NET SDK's version. If I go to the project's Properties, all previous 4 SDK versions appear, except for the 3.1 one. Is there any workaround fix for this or shall I just reinstall Visual Studio?

Answer 1

To target.Net Core 3.1 with the SDK 3.1.300 you Visual Studio 2019 Update 6 (16.6):

So, run Visual Studio Installer and install the offered 16.6 update.

Answer 2

Visual Studio won't be able to find the latest SDK if it's a different bit size than the first SDK installation. To fix that case see Windows or Visual Studio can't find the latest installed .NET SDK