I did it in .NET Core a bit less effortlessly, by adding a sidecar with some profiling tools, adding a few environment variables to the .NET Core process, and execing into the sidecar. Instructions: [0].

I believe kubectl-flame can support .NET pretty easily since it works the same way: "Interaction with the target JVM is done via a shared /tmp folder."

[0] https://github.com/joe-elliott/netcore-kubernetes-profiling/...