-
vs-streamjsonrpc
The StreamJsonRpc library offers JSON-RPC 2.0 over any .NET Stream, WebSocket, or Pipe. With bonus support for request cancellation, client proxy generation, and more.
-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
There's an older library that uses a native DLL for HTTP/2 support but it's been deprecated a while: https://github.com/grpc/grpc/tree/master/src/csharp
I've had a lot of success with StreamJsonRpc over named pipes, including your exact scenario (Framework talking to Core with a shared Standard library holding all the IPC stuff).
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.