"We promise not to sue you" is much weaker than a proper patent-grant. That promise seems only to apply if you use the .NET runtime. If you used a forked proje

"We promise not to sue you" is much weaker than a proper patent-grant. That promise seems only to apply if you use the .NET runtime. If you used a forked project, it might not apply. See also: https://endsoftwarepatents.org/2014/11/ms-net/ https://endsoftwarepatents.org/2014/11/ms-net/