So 2021/2/8 12:20:29
我发现，第一次生成解决方案，然后dotnet publish，都是没有问题的，然后第二次 重新生成解决方案，然后dotnet publish就会提示：
\project.assets.json’ doesn’t have a target for ‘netcoreapp2.2’. Ensure that restore has run and that you have included ‘netcoreapp2.2’ in the TargetFrameworks for your project.
So 2021/2/8 13:50:03
解决了
