`import clr` with no .NET runtime should give a helpful message · Issue #1868 · pythonnet/pythonnet · GitHub

Currently we get

RuntimeError: Could not find libmono

While it is mostly obvious, it would not hurt to expand it to something like

A compatible .NET runtime could not be found. Install a compatible runtime or load one explicitly using set_runtime or set_runtime_from_env.

import clr with no .NET runtime should give a helpful message #1868