NSwag generates invalid C# code when /GenerateBaseUrlProperty:false option is used. It looks like it is a regression in v14.0.1 possibly caused by #4691
Here's a simple project which demonstrates the regression: GenerateBaseUrlPropertyFalse.zip. It will download and use example petstore OpenAPI document. Just run dotnet build.
It works with NSwag.ApiDescription.Client 13.20.0 and 14.0.0 but fails with 14.0.1

@paulomorgado