Create .NET bot

dotnet/Program.cs

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+using System;
+using System.Diagnostics;
+using System.ComponentModel;
+using System.Text.Json.Serialization;
+using System.Text.Json;
+using StreamJsonRpc;
+using System.Buffers;
+
+Process childProcess = Process.Start(new ProcessStartInfo("deltachat-rpc-server")
+{
+    RedirectStandardInput = true,
+    RedirectStandardOutput = true,
+});
+
+var formatter = new StreamJsonRpc.SystemTextJsonFormatter();
+
+// "kind" property does not have to be the first.
+// Otherwise messages like
+// `{"jsonrpc":"2.0","id":18,"result":{"contextId":1,"event":{"comment":null,"kind":"ConfigureProgress","progress":1}}}`
+// don't parse because `comment` goes before `kind`.
+formatter.JsonSerializerOptions.AllowOutOfOrderMetadataProperties = true;
+
+JsonRpc rpc = new JsonRpc(new StreamJsonRpc.NewLineDelimitedMessageHandler(childProcess.StandardInput.BaseStream, childProcess.StandardOutput.BaseStream, formatter));
+rpc.StartListening();
+
+var accounts = await rpc.InvokeAsync<int[]>("get_all_account_ids");
+int accountId;
+if(accounts.Length == 0) {
+  accountId = await rpc.InvokeAsync<int>("add_account");
+} else {
+  accountId = accounts[0];
+}
+
+var res = await rpc.InvokeAsync<Dictionary<String, String>>("get_system_info");
+
+foreach(var item in res)
+{
+  Console.WriteLine($"{item.Key}={item.Value}");
+}
+
+bool isConfigured = await rpc.InvokeAsync<bool>("is_configured", accountId);
+if(!isConfigured) {
+  Console.WriteLine("not configured");
+  await rpc.InvokeAsync("set_config_from_qr", accountId, "dcaccount:https://nine.testrun.org/new");
+  await rpc.InvokeAsync("configure", accountId);
+}
+
+await rpc.InvokeAsync("start_io_for_all_accounts");
+
+while(true) {
+  Event eventResponse = await rpc.InvokeAsync<Event>("get_next_event");
+  if (eventResponse.@event is InfoEventType infoEvent) {
+    Console.WriteLine($"INFO: {infoEvent.msg}");
+  } else {
+    Console.WriteLine($"Got event {eventResponse}");
+  }
+}
+
+public class Event {
+  public int contextId { get; set; }
+  public EventType @event { get; set; }
+}
+
+[JsonPolymorphic(TypeDiscriminatorPropertyName = "kind", IgnoreUnrecognizedTypeDiscriminators = true)]
+[JsonDerivedType(typeof(InfoEventType), typeDiscriminator: "Info")]
+public class EventType {
+}
+
+public class InfoEventType : EventType {
+  public string msg { get; set; }
+}

dotnet/README.md

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+To run C# bot,
+you need to install .NET.
+On Arch Linux it can be done with
+`pacman -S dotnet-sdk`.
+
+To build the program,
+run `dotnet build`.
+
+To run the program,
+run `dotnet run`.
+
+To get debugging logs of all JSON-RPC messages, run with `RUST_LOG="deltachat_rpc_server=trace" dotnet run`.

dotnet/csharp.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="StreamJsonRpc" Version="2.21.69" />
+  </ItemGroup>
+
+</Project>