我遇到了类似的错误(请参阅以下问题:

I had a similar error (see this question: Swagger-codegen: error building Pet Store example for .NET Core)

对我来说，解决方法是运行dotnet migrate，该更新将项目更新为使用.csproj并将.xproj和project.json移开.

The fix for me was to run dotnet migrate which updates the project to use a .csproj and moves the .xproj and project.json out of the way.

此处的更多信息: https://docs. microsoft.com/en-us/dotnet/core/migration/#dotnet-migrate