https://groups.google.com/g/nrules-users
NRules Users - Google Groups
usersgooglegroups
https://www.nuget.org/packages/NRules/0.9.4
NuGet Gallery | NRules 0.9.4
NRules is an open source rules engine for .NET that is based on the Rete matching algorithm with rules authored in C# using internal DSL.
nuget gallery