It seems like he was happy that he was developing on Linux, because Linux is not the happy case for .NET. By doing so, he discovered a bug he might not have otherwise discovered until he was running his project on a Linux environment.
ex:
microsoft/dotnet:latest is a debian based image[1]
microsoft/dotnet:core is a debian based image[2]
[0] - https://hub.docker.com/r/microsoft/dotnet/
[1] - https://github.com/dotnet/dotnet-docker/blob/master/1.0.0-pr...
[2] - https://github.com/dotnet/dotnet-docker/blob/master/1.0/debi...