* Improved "MessageChatTypeFilter", now accepts flagged version of "ChatType" enum. "ChatTypeFlags"

* Added classes to reactive update filter annotations implementation "FilterAnnotation"
* "CollectHandlersDowmainWide" method moved as extension to IHandlersCollection and added method "CollectHandlerAssemblyWide" named respectfully
* Added "DefaultRouterExceptionHandler" to reactive implement "IRouterExceptionHandler" from function delegate
* Small bug fixes in API overview generator logic

Telegrator.Generators/ApiMarkdownGenerator.cs

@@ -1,10 +1,7 @@
 using Microsoft.CodeAnalysis;
-using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using System.Collections.Immutable;
-using System.Reflection.Metadata.Ecma335;
 using System.Text;
-using System.Xml;
 using System.Xml.Linq;
 
 namespace Telegrator.Generators
@@ -71,7 +68,7 @@ namespace Telegrator.Generators
                     if (!string.IsNullOrWhiteSpace(typeSummary))
                         sourceBuilder.AppendFormat("> {0}\n\n", typeSummary);
 
-                    // Writing members
+                    // Writing fields
                     if (type.TypeKind == TypeKind.Enum)
                     {
                         WriteEnumValues(sourceBuilder, type);
@@ -105,7 +102,7 @@ namespace Telegrator.Generators
             sourceBuilder.AppendLine("**Constructors:**");
             foreach (IMethodSymbol ctor in ctors)
             {
-                // Формируем строку вида ClassName<Type1, T>(Param1, Param2) с generic-аргументами
+                // Formatting constructor signature
                 string genericArgs = type.FormatGenericTypes();
                 string parameters = string.Join(", ", ctor.Parameters.Select(p => p.Type.GetShortName()));
                 string signature = string.Format("{0}{1}({2})", type.Name, genericArgs, parameters);
@@ -114,7 +111,9 @@ namespace Telegrator.Generators
                 // Writing summary
                 string? propSummary = ctor.ExtractSummary();
                 if (!string.IsNullOrWhiteSpace(propSummary))
-                    sourceBuilder.Append("   > ").Append(propSummary).AppendLine();
+                    sourceBuilder.Append("   > ").Append(propSummary);
+
+                sourceBuilder.AppendLine();
             }
 
             sourceBuilder.AppendLine();
@@ -122,19 +121,32 @@ namespace Telegrator.Generators
 
         private static void WriteEnumValues(StringBuilder sourceBuilder, INamedTypeSymbol type)
         {
-            var members = type.GetMembers().OfType<IFieldSymbol>().Where(f => f.HasConstantValue && f.DeclaredAccessibility == Accessibility.Public).ToList();
+            // Getting enum values
-            if (members.Count == 0)
+            List<IFieldSymbol> fields = type
+                .GetMembers()
+                .OfType<IFieldSymbol>()
+                .Where(f => f.HasConstantValue && f.DeclaredAccessibility == Accessibility.Public)
+                .ToList();
+
+            // Checking for any
+            if (fields.Count == 0)
                 return;
 
+            // Writing
             sourceBuilder.AppendLine("**Values:**");
-            foreach (IFieldSymbol field in members)
+            foreach (IFieldSymbol field in fields)
             {
+                // Writing value
                 sourceBuilder.Append("- `").Append(field.Name).Append("`");
+
+                // Writing summary
                 string? summary = field.ExtractSummary();
                 if (!string.IsNullOrWhiteSpace(summary))
                     sourceBuilder.Append(" — ").Append(summary);
+                
                 sourceBuilder.AppendLine();
             }
+
             sourceBuilder.AppendLine();
         }
 
@@ -187,9 +199,9 @@ namespace Telegrator.Generators
             sourceBuilder.AppendLine("**Methods:**");
             foreach (IMethodSymbol method in methods)
             {
-                // Формируем generic-параметры для метода
+                // Formating method signature
                 string genericArgs = method.FormatGenericTypes();
-                string parameters = string.Join(", ", method.Parameters.Select(p => p.Type.GetShortName()));
+                string parameters = string.Join(", ", method.Parameters.Select(p => p.Type.GetShortName()).Where(p => !string.IsNullOrEmpty(p)));
                 sourceBuilder.AppendFormat(" - `{0}{1}({2})`\n", method.Name, genericArgs, parameters);
 
                 // Writing summary
@@ -215,17 +227,20 @@ namespace Telegrator.Generators
             try
             {
                 XDocument doc = XDocument.Parse(xmlDoc);
-                XElement? summary = doc.Root?.Element("summary");
+                XElement? xSummary = doc.Root?.Element("summary");
 
-                if (summary == null)
+                if (xSummary == null)
                     return null;
 
                 // Убираем лишние пробелы и переносы строк
-                return summary.Value.Trim().Replace("\n", " ").Replace("  ", " ");
+                string summary = xSummary.Value.Trim().Replace("\n", " ");
+                while (summary.Contains("  "))
+                    summary = summary.Replace("  ", " ");
+
+                return summary;
             }
             catch
             {
-                // Игнорируем ошибки парсинга XML
                 return null;
             }
         }

Telegrator.Hosting/Polling/HostUpdateRouter.cs

@@ -18,7 +18,6 @@ namespace Telegrator.Hosting.Polling
         /// </summary>
         protected readonly ILogger<HostUpdateRouter> Logger;
 
-        // Ehat a mess :/
         /// <inheritdoc/>
         public HostUpdateRouter(
             IHandlersProvider handlersProvider,
@@ -28,7 +27,7 @@ namespace Telegrator.Hosting.Polling
             ILogger<HostUpdateRouter> logger) : base(handlersProvider, awaitingProvider, options.Value, handlersPool)
         {
             Logger = logger;
-            ExceptionHandler = new HostExceptionHandler(logger);
+            ExceptionHandler = new DefaultRouterExceptionHandler(HandleException);
         }
 
         /// <inheritdoc/>
@@ -41,21 +40,21 @@ namespace Telegrator.Hosting.Polling
         /// <summary>
         /// Default exception handler of this router
         /// </summary>
-        /// <param name="logger"></param>
+        /// <param name="botClient"></param>
-        private class HostExceptionHandler(ILogger<HostUpdateRouter> logger) : IRouterExceptionHandler
+        /// <param name="exception"></param>
+        /// <param name="source"></param>
+        /// <param name="cancellationToken"></param>
+        public void HandleException(ITelegramBotClient botClient, Exception exception, HandleErrorSource source, CancellationToken cancellationToken)
         {
-            public void HandleException(ITelegramBotClient botClient, Exception exception, HandleErrorSource source, CancellationToken cancellationToken)
+            if (exception is HandlerFaultedException handlerFaultedException)
             {
-                if (exception is HandlerFaultedException handlerFaultedException)
+                Logger.LogError("\"{handler}\" handler's execution was faulted :\n{exception}",
-                {
+                    handlerFaultedException.HandlerInfo.ToString(),
-                    logger.LogError("\"{handler}\" handler's execution was faulted :\n{exception}",
+                    handlerFaultedException.InnerException?.ToString() ?? "No inner exception");
-                        handlerFaultedException.HandlerInfo.ToString(),
+                return;
-                        handlerFaultedException.InnerException?.ToString() ?? "No inner exception");
-                    return;
-                }
-
-                logger.LogError("Exception was thrown during update routing faulted :\n{exception}", exception.ToString());
             }
+
+            Logger.LogError("Exception was thrown during update routing faulted :\n{exception}", exception.ToString());
         }
     }
 }

Telegrator.Hosting/Telegrator.Hosting.csproj

@@ -15,7 +15,7 @@
 	  <EnableNETAnalyzers>True</EnableNETAnalyzers>
 	  <EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
 	  <PackageLicenseFile>LICENSE</PackageLicenseFile>
-	  <Version>1.0.1</Version>
+	  <Version>1.0.2</Version>
   </PropertyGroup>
 
   <ItemGroup>

Telegrator.Hosting/TypesExtensions.cs

@@ -43,7 +43,7 @@ namespace Telegrator.Hosting
         /// <returns></returns>
         public static IServiceCollection AddTelegramBotHostDefaults(this IServiceCollection services)
         {
-            services.AddLogging(builder => builder.AddConsole());
+            services.AddLogging(builder => builder.AddConsole().AddDebug());
             services.AddSingleton<IUpdateHandlersPool, HostUpdateHandlersPool>();
             services.AddSingleton<IAwaitingProvider, HostAwaitingProvider>();
             services.AddSingleton<IHandlersProvider, HostHandlersProvider>();

Telegrator/Annotations/MessageChatFilterAttributes.cs

@@ -21,10 +21,22 @@ namespace Telegrator.Annotations
     /// <summary>
     /// Attribute for filtering messages sent in chats of a specific type.
     /// </summary>
-    /// <param name="type">The chat type to match</param>
+    public class ChatTypeAttribute : MessageFilterAttribute
-    public class ChatTypeAttribute(ChatType type)
+    {
-        : MessageFilterAttribute(new MessageChatTypeFilter(type))
+        /// <summary>
-    { }
+        /// Initialize new instance of <see cref="ChatTypeAttribute"/> to filter messages from chat from specific chats
+        /// </summary>
+        /// <param name="type"></param>
+        public ChatTypeAttribute(ChatType type)
+            : base(new MessageChatTypeFilter(type)) { }
+
+        /// <summary>
+        /// Initialize new instance of <see cref="ChatTypeAttribute"/> to filter messages from chat from specific chats (with flags)
+        /// </summary>
+        /// <param name="flags"></param>
+        public ChatTypeAttribute(ChatTypeFlags flags)
+            : base(new MessageChatTypeFilter(flags)) { }
+    }
 
     /// <summary>
     /// Attribute for filtering messages based on the chat title.

Telegrator/Attributes/FilterAnnotation.cs

@@ -0,0 +1,49 @@
+using Telegram.Bot.Types;
+using Telegram.Bot.Types.Enums;
+using Telegrator.Filters;
+using Telegrator.Filters.Components;
+
+namespace Telegrator.Attributes
+{
+    /// <summary>
+    /// Reactive way to implement a new <see cref="UpdateFilterAttribute{T}"/> of type <typeparamref name="T"/>
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public abstract class FilterAnnotation<T> : UpdateFilterAttribute<T>, IFilter<T> where T : class
+    {
+        /// <inheritdoc/>
+        public bool IsCollectible => false;
+
+        /// <summary>
+        /// Initializes new instance of <see cref="FilterAnnotation{T}"/>
+        /// </summary>
+        public FilterAnnotation() : base()
+        {
+            UpdateFilter = Filter<T>.If(CanPass);
+            AnonymousFilter = AnonymousTypeFilter.Compile(UpdateFilter, GetFilterringTarget);
+        }
+
+        /// <inheritdoc/>
+        public abstract bool CanPass(FilterExecutionContext<T> context);
+    }
+
+    /// <inheritdoc/>
+    public abstract class MessageFilterAnnotation() : FilterAnnotation<Message>()
+    {
+        /// <inheritdoc/>
+        public override UpdateType[] AllowedTypes => [UpdateType.Message, UpdateType.EditedMessage, UpdateType.ChannelPost, UpdateType.EditedChannelPost, UpdateType.BusinessMessage, UpdateType.EditedBusinessMessage];
+        
+        /// <inheritdoc/>
+        public override Message? GetFilterringTarget(Update update) => update.Message;
+    }
+
+    /// <inheritdoc/>
+    public abstract class CallbackQueryFilterAnnotation() : FilterAnnotation<CallbackQuery>()
+    {
+        /// <inheritdoc/>
+        public override UpdateType[] AllowedTypes => [UpdateType.CallbackQuery];
+
+        /// <inheritdoc/>
+        public override CallbackQuery? GetFilterringTarget(Update update) => update.CallbackQuery;
+    }
+}

Telegrator/Attributes/UpdateFilterAttribute.cs

@@ -20,7 +20,17 @@ namespace Telegrator.Attributes
         /// <summary>
         /// Gets the compiled filter logic for the update target.
         /// </summary>
-        public Filter<T> UpdateFilter { get; private set; }
+        public Filter<T> UpdateFilter { get; protected set; }
+
+        /// <summary>
+        /// Empty constructor for internal using
+        /// </summary>
+        internal UpdateFilterAttribute()
+        {
+            AnonymousFilter = null!;
+            UpdateFilter = null!;
+            _ = 0xBAD + 0xC0DE;
+        }
 
         /// <summary>
         /// Initializes the attribute with one or more filters for the update target.

Telegrator/Enums.cs

@@ -36,4 +36,64 @@
         /// </summary>
         Casino
     }
+
+    /// <summary>
+    /// Flags version of <see cref="Telegram.Bot.Types.Enums.ChatType"/>
+    /// Type of the <see cref="Telegram.Bot.Types.Chat"/>, from which the message or inline query was sent
+    /// </summary>
+    [Flags]
+    public enum ChatTypeFlags
+    {
+        /// <summary>
+        /// Normal one-to-one chat with a user or bot
+        /// </summary>
+        Private = 0x1,
+
+        /// <summary>
+        /// Normal group chat
+        /// </summary>
+        Group = 0x2,
+
+        /// <summary>
+        /// A channel
+        /// </summary>
+        Channel = 0x4,
+
+        /// <summary>
+        /// A supergroup
+        /// </summary>
+        Supergroup = 0x8,
+
+        /// <summary>
+        /// Value possible only in <see cref="Telegram.Bot.Types.InlineQuery.ChatType"/>: private chat with the inline query sender
+        /// </summary>
+        Sender
+    }
+
+    /// <summary>
+    /// Levels of debug writing
+    /// </summary>
+    [Flags]
+    public enum DebugLevel
+    {
+        /// <summary>
+        /// Write debug messages from filters execution
+        /// </summary>
+        Filters = 0x1,
+
+        /// <summary>
+        /// Write debug messages from handlers providers execution
+        /// </summary>
+        Providers = 0x2,
+
+        /// <summary>
+        /// Write debug messages from update router's execution
+        /// </summary>
+        Router = 0x4,
+
+        /// <summary>
+        /// Write debug messages from handlers pool execution
+        /// </summary>
+        HandlersPool = 0x8
+    }
 }

Telegrator/Filters/Filter.cs

@@ -57,6 +57,12 @@ namespace Telegrator.Filters
         /// <param name="context">The filter execution context.</param>
         /// <returns>True if the filter passes; otherwise, false.</returns>
         public abstract bool CanPass(FilterExecutionContext<T> context);
+
+        /// <summary>
+        /// Implicitly creates <see cref="IFilter{T}"/> from function
+        /// </summary>
+        /// <param name="filter"></param>
+        public static implicit operator Filter<T>(Func<FilterExecutionContext<T>, bool> filter) => Filter<T>.If(filter);
     }
 
     /// <summary>

Telegrator/Filters/MessageChatFilters.cs

@@ -1,5 +1,6 @@
 using Telegram.Bot.Types;
 using Telegram.Bot.Types.Enums;
+using Telegram.Bot.Types.ReplyMarkups;
 using Telegrator.Filters.Components;
 
 namespace Telegrator.Filters
@@ -54,13 +55,49 @@ namespace Telegrator.Filters
     /// <summary>
     /// Filters messages whose chat type matches the specified value.
     /// </summary>
-    public class MessageChatTypeFilter(ChatType type) : MessageChatFilter
+    public class MessageChatTypeFilter : MessageChatFilter
     {
-        private readonly ChatType Type = type;
+        private readonly ChatType? Type;
+        private readonly ChatTypeFlags? Flags;
+
+        /// <summary>
+        /// Initialize new instance of <see cref="MessageChatTypeFilter"/>
+        /// </summary>
+        /// <param name="type"></param>
+        public MessageChatTypeFilter(ChatType type)
+            => Type = type;
+
+        /// <summary>
+        /// Initialize new instance of <see cref="MessageChatTypeFilter"/> with <see cref="ChatTypeFlags"/>
+        /// </summary>
+        /// <param name="type"></param>
+        public MessageChatTypeFilter(ChatTypeFlags type)
+            => Flags = type;
 
         /// <inheritdoc/>
         protected override bool CanPassNext(FilterExecutionContext<Chat> _)
-            => Chat.Type == Type;
+        {
+            if (Type.HasValue)
+                return Chat.Type == Type.Value;
+
+            if (Flags != null)
+            {
+                ChatTypeFlags? asFlag = ToFlag(Chat.Type);
+                return asFlag.HasValue && Flags.Value.HasFlag(asFlag.Value);
+            }
+
+            return false;
+        }
+
+        private static ChatTypeFlags? ToFlag(ChatType type) => type switch
+        {
+            ChatType.Channel => ChatTypeFlags.Channel,
+            ChatType.Group => ChatTypeFlags.Group,
+            ChatType.Supergroup => ChatTypeFlags.Supergroup,
+            ChatType.Sender => ChatTypeFlags.Sender,
+            ChatType.Private => ChatTypeFlags.Private,
+            _ => null
+        };
     }
 
     /// <summary>

Telegrator/LeveledDebug.cs

@@ -1,4 +1,5 @@
 using System.Diagnostics;
+using Telegram.Bot.Types.Enums;
 
 namespace Telegrator
 {
@@ -91,31 +92,4 @@ namespace Telegrator
                 Debug.WriteLine(message, args);
         }
     }
-
-    /// <summary>
-    /// Levels of debug writing
-    /// </summary>
-    [Flags]
-    public enum DebugLevel
-    {
-        /// <summary>
-        /// Write debug messages from filters execution
-        /// </summary>
-        Filters = 0x1,
-
-        /// <summary>
-        /// Write debug messages from handlers providers execution
-        /// </summary>
-        Providers = 0x2,
-
-        /// <summary>
-        /// Write debug messages from update router's execution
-        /// </summary>
-        Router = 0x4,
-
-        /// <summary>
-        /// Write debug messages from handlers pool execution
-        /// </summary>
-        HandlersPool = 0x8
-    }
 }

Telegrator/MadiatorCore/IHandlersCollection.cs

@@ -32,11 +32,13 @@ namespace Telegrator.MadiatorCore
         /// <returns>The handler descriptor list for the given update type.</returns>
         public HandlerDescriptorList this[UpdateType updateType] { get; }
 
+        /*
         /// <summary>
         /// Collects all handlers domain-wide and returns a new <see cref="IHandlersCollection"/>.
         /// </summary>
         /// <returns>A new <see cref="IHandlersCollection"/> with all handlers collected.</returns>
         public IHandlersCollection CollectHandlersDomainWide();
+        */
 
         /// <summary>
         /// Adds a <see cref="HandlerDescriptor"/> to the collection and returns the updated collection.

Telegrator/MadiatorCore/IRouterExceptionHandler.cs

@@ -1,5 +1,6 @@
 using Telegram.Bot;
 using Telegram.Bot.Polling;
+using Telegrator.Polling;
 
 namespace Telegrator.MadiatorCore
 {

Telegrator/Polling/DefaultRouterExceptionHandler.cs

@@ -0,0 +1,36 @@
+using Telegram.Bot;
+using Telegram.Bot.Polling;
+using Telegrator.MadiatorCore;
+
+namespace Telegrator.Polling
+{
+    /// <summary>
+    /// Delegate used to handle <see cref="IUpdateRouter"/> exception
+    /// </summary>
+    /// <param name="botClient"></param>
+    /// <param name="exception"></param>
+    /// <param name="source"></param>
+    /// <param name="cancellationToken"></param>
+    public delegate void RouterExceptionHandler(ITelegramBotClient botClient, Exception exception, HandleErrorSource source, CancellationToken cancellationToken);
+
+    /// <summary>
+    /// Realizes <see cref="IRouterExceptionHandler"/> using function delegate
+    /// </summary>
+    /// <param name="handler"></param>
+    public sealed class DefaultRouterExceptionHandler(RouterExceptionHandler handler) : IRouterExceptionHandler
+    {
+        private readonly RouterExceptionHandler _handler = handler;
+
+        /// <inheritdoc/>
+        public void HandleException(ITelegramBotClient botClient, Exception exception, HandleErrorSource source, CancellationToken cancellationToken)
+        {
+            try
+            {
+                _handler.Invoke(botClient, exception, source, cancellationToken);
+            }
+            finally
+            {
+                _ = 0xBAD + 0xC0DE;
+            }
+        }}
+}

Telegrator/Providers/HandlersCollection.cs

@@ -1,6 +1,5 @@
 using System.Reflection;
 using Telegram.Bot.Types.Enums;
-using Telegrator;
 using Telegrator.Annotations;
 using Telegrator.Attributes;
 using Telegrator.Configuration;
@@ -60,25 +59,6 @@ namespace Telegrator.Providers
             get => InnerDictionary[updateType];
         }
 
-        /// <inheritdoc/>
-        /// <summary>
-        /// Collects all handlers from the entry assembly domain-wide.
-        /// Scans for types that implement handlers and adds them to the collection.
-        /// </summary>
-        /// <returns>This collection instance for method chaining.</returns>
-        /// <exception cref="Exception">Thrown when the entry assembly cannot be found.</exception>
-        public virtual IHandlersCollection CollectHandlersDomainWide()
-        {
-            Assembly? entryAssembly = Assembly.GetEntryAssembly() ?? throw new Exception();
-            entryAssembly.GetExportedTypes()
-                .Where(type => type.GetCustomAttribute<DontCollectAttribute>() == null)
-                .Where(type => type.IsHandlerRealization())
-                .ForEach(type => AddHandler(type));
-
-            return this;
-        }
-
-        /// <inheritdoc/>
         /// <summary>
         /// Adds a handler descriptor to the collection.
         /// </summary>
@@ -100,7 +80,6 @@ namespace Telegrator.Providers
             return this;
         }
 
-        /// <inheritdoc/>
         /// <summary>
         /// Adds a handler type to the collection.
         /// </summary>
@@ -112,7 +91,6 @@ namespace Telegrator.Providers
             return this;
         }
 
-        /// <inheritdoc/>
         /// <summary>
         /// Adds a handler type to the collection.
         /// </summary>
@@ -138,7 +116,6 @@ namespace Telegrator.Providers
             return this;
         }
 
-        /// <inheritdoc/>
         /// <summary>
         /// Gets or creates a descriptor list for the specified update type.
         /// </summary>
@@ -155,7 +132,6 @@ namespace Telegrator.Providers
             return list;
         }
 
-        /// <inheritdoc/>
         /// <summary>
         /// Checks for intersecting command aliases and handles them according to configuration.
         /// </summary>

Telegrator/Telegrator.csproj

@@ -17,7 +17,7 @@
     <EnableNETAnalyzers>True</EnableNETAnalyzers>
     <EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
-    <Version>1.0.1</Version>
+    <Version>1.0.2</Version>
   </PropertyGroup>
 
   <ItemGroup>

Telegrator/TypesExtensions.cs

@@ -1,7 +1,6 @@
 using System.Collections;
 using System.Collections.ObjectModel;
 using System.Reflection;
-using System.Runtime.CompilerServices;
 using Telegram.Bot.Types;
 using Telegram.Bot.Types.Enums;
 using Telegram.Bot.Types.Payments;
@@ -166,8 +165,46 @@ namespace Telegrator
     /// Extension methods for handlers collections.
     /// Provides convenient methods for creating implicit handlers.
     /// </summary>
-    public static class HandlersCollectionExtensions
+    public static partial class HandlersCollectionExtensions
     {
+        private static readonly string[] skippingAssemblies = ["System", "Microsoft", "Telegrator"];
+
+        /// <summary>
+        /// Collects all handlers from the current app domain.
+        /// Scans for types that implement handlers and adds them to the collection.
+        /// </summary>
+        /// <returns>This collection instance for method chaining.</returns>
+        /// <exception cref="Exception">Thrown when the entry assembly cannot be found.</exception>
+        public static IHandlersCollection CollectHandlersDomainWide(this IHandlersCollection handlers)
+        {
+            AppDomain.CurrentDomain
+                .GetAssemblies()
+                .Where(ass => skippingAssemblies.All(skip => !ass.FullName.Contains(skip)))
+                .SelectMany(ass => ass.GetExportedTypes())
+                .Where(type => type.GetCustomAttribute<DontCollectAttribute>() == null)
+                .Where(type => type.IsHandlerRealization())
+                .ForEach(type => handlers.AddHandler(type));
+
+            return handlers;
+        }
+
+        /// <summary>
+        /// Collects all handlers from the calling this function assembly.
+        /// Scans for types that implement handlers and adds them to the collection.
+        /// </summary>
+        /// <returns>This collection instance for method chaining.</returns>
+        /// <exception cref="Exception">Thrown when the entry assembly cannot be found.</exception>
+        public static IHandlersCollection CollectHandlersAssemblyWide(this IHandlersCollection handlers)
+        {
+            Assembly.GetCallingAssembly()
+                .GetExportedTypes()
+                .Where(type => type.GetCustomAttribute<DontCollectAttribute>() == null)
+                .Where(type => type.IsHandlerRealization())
+                .ForEach(type => handlers.AddHandler(type));
+
+            return handlers;
+        }
+
         /// <summary>
         /// Creates a handler builder for a specific update type.
         /// </summary>