Azure bicep Failed to install .NET runtime v5.0. in visual studio code

Problem

When I use bicep in Visual Studio Code on a Windows PC, I get the error Failed to install.NET runtime v5.0.

Asked by pbj

Post is based on https://stackoverflow.com/questions/70369299/azure-bicep-failed-to-install-net-runtime-v5-0-in-visual-studio-code