Create .NET bot

[link2xt]

.NET has built-in support for JSON-RPC: https://github.com/microsoft/vs-streamjsonrpc/
So it should fit well for bot creation.
I don't have any experience with .NET packaging, but it may be worth building some basic example in case someone familiar with C# or F# wants to write a bot and take over maintenance of "bindings".

[link2xt]

This already configures an account and starts I/O.

Have not figured out how to parse events with are distinguished by "kind".
Somewhat relevant documentation:
https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/polymorphism

Related issue about matching F# types to union types: dotnet/runtime#55744

[link2xt]

Deserialization now works for info messages, but for {"jsonrpc":"2.0","id":18,"result":{"contextId":1,"event":{"comment":null,"kind":"ConfigureProgress","progress":1}}} it fails with
"Unhandled exception. System.Text.Json.JsonException: Deserializing JSON-RPC result to type Event failed with JsonException: The metadata property is either not supported by the type or is not the first property in the deserialized JSON object."

So it is unhappy about "kind" being not the first type because there is a "comment" before that.

One way is to switch from StreamJsonRpc.SystemTextJsonFormatter to StreamJsonRpc.JsonMessageFormatter which uses Newtonsoft JSON library instead of standard one. But then polymorphic attributes from the standard library will not work, need to redo the class hieararchy for events.

Maybe there is a solution for standard library or we can change the core to always put "kind" first.

EDIT: fixed with AllowOutOfOrderMetadataProperties.