Добавил DI, основные классы создаются через вбрасывание зависимостей через конструктор

BotService.cs

@@ -8,6 +8,7 @@ using System.Threading.Tasks;
 using Telegram.Bot;
 using Telegram.Bot.Args;
 using Telegram.Bot.Types.ReplyMarkups;
+using ZaoBot.Config;
 
 namespace ZaoBot
 {
@@ -20,15 +21,15 @@ namespace ZaoBot
 
 		bool shouldRestart = false;
 
-		public BotService(JsonDocument config)
+		public BotService(IConfig config, OpenHab.OpenHabClient openhab)
 		{
-			this.config = config;
+			this.config = config.Data;
+			this.openhab = openhab;
 		}
 
 		public void Run()
 		{
 			var token = config.RootElement.GetProperty("token").GetString();
-			openhab = new OpenHab.OpenHabClient(config.RootElement.GetProperty("openhab_url").GetString());
 			while (true)
 			{
 				shouldRestart = false;

NotificationReceiver.cs

@@ -5,6 +5,7 @@ using System.Text;
 using System.Text.Json;
 using System.Threading;
 using Telegram.Bot;
+using ZaoBot.Config;
 
 namespace ZaoBot
 {
@@ -12,9 +13,9 @@ namespace ZaoBot
 	{
 		private JsonDocument config;
 
-		public NotificationReceiver(JsonDocument config)
+		public NotificationReceiver(IConfig config)
 		{
-			this.config = config;
+			this.config = config.Data;
 		}
 
 		public void Run()

OpenHab/OpenHabClient.cs

@@ -5,19 +5,19 @@ using System.Net.Http.Headers;
 using System.Text;
 using System.Text.Json;
 using System.Threading.Tasks;
+using ZaoBot.Config;
 
 namespace ZaoBot.OpenHab
 {
 	class OpenHabClient
 	{
 		private string url;
-		private string token;
+		private string token = "";
 		HttpClient http = new HttpClient();
 
-		public OpenHabClient(string url, string token = "")
+		public OpenHabClient(IConfig config)
 		{
-			this.url = url;
-			this.token = token;
+			this.url = config.Data.RootElement.GetProperty("openhab_url").GetString();
 			if (!string.IsNullOrEmpty(token))
 			{
 				http.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", token + ":");

Program.cs

@@ -1,9 +1,12 @@
-using System;
+using Microsoft.Extensions.DependencyInjection;
+using System;
 using System.Globalization;
 using System.IO;
 using System.Reflection;
 using System.Text.Json;
 using System.Threading;
+using ZaoBot.Config;
+using ZaoBot.OpenHab;
 
 namespace ZaoBot
 {
@@ -12,30 +15,45 @@ namespace ZaoBot
 		static BotService bot;
 		static JsonDocument config;
 
+		static ServiceCollection services;
+
 		static void Main(string[] args)
 		{
 			CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
 			config = LoadConfig();
-			var receiver = new NotificationReceiver(config);
-			var notificationThread = new Thread(new ThreadStart(receiver.Run));
-			notificationThread.Start();
-			while (true)
+			services = new ServiceCollection();
+			services.AddSingleton<IConfig, Config.Config>(CreateConfig);
+			services.AddSingleton<BotService, BotService>();
+			services.AddSingleton<OpenHabClient, OpenHabClient>();
+			services.AddSingleton<NotificationReceiver, NotificationReceiver>();
+			using (var provider = services.BuildServiceProvider())
 			{
-				try
+				var receiver = provider.GetRequiredService<NotificationReceiver>();
+				var notificationThread = new Thread(new ThreadStart(receiver.Run));
+				notificationThread.Start();
+				while (true)
 				{
-					bot = new BotService(config);
-					bot.Run();
-				}
-				catch (Exception e)
-				{
-					// Тут ловим всё, при ошибках просто заново поднимаем бота
-					Console.WriteLine("Exception: " + e.Message);
-					Console.WriteLine(e.StackTrace);
-					Console.WriteLine("Restarting bot");
+					try
+					{
+						bot = provider.GetRequiredService<BotService>();
+						bot.Run();
+					}
+					catch (Exception e)
+					{
+						// Тут ловим всё, при ошибках просто заново поднимаем бота
+						Console.WriteLine("Exception: " + e.Message);
+						Console.WriteLine(e.StackTrace);
+						Console.WriteLine("Restarting bot");
+					}
 				}
 			}
 		}
 
+		private static Config.Config CreateConfig(IServiceProvider arg)
+		{
+			return new Config.Config(config);
+		}
+
 		private static JsonDocument LoadConfig()
 		{
 			string assemblyFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);

ZaoBot.csproj

@@ -6,6 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
     <PackageReference Include="Telegram.Bot" Version="19.0.0" />
   </ItemGroup>
 

config/Config.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Json;
+
+namespace ZaoBot.Config
+{
+	public class Config : IConfig
+	{
+		JsonDocument data;
+		public JsonDocument Data => data;
+
+		public Config(JsonDocument data)
+		{
+			this.data = data;
+		}
+	}
+}

config/IConfig.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Json;
+
+namespace ZaoBot.Config
+{
+	interface IConfig
+	{
+		JsonDocument Data { get; }
+	}
+}