NetTelegramBotApi

C# client library for building Telegram bots (https://core.telegram.org/bots/api).

Contains strongly-typed request and response classes, and transport class for sending requests and receiving results. Uses System.Text.Json only.

Usage

var bot = new TelegramBot(accessToken, new HttpClient());
var me = await bot.GetMe();
if (me != null)
{
   Console.WriteLine("Me: {0} (@{1})", me.FirstName, me.Username);
}

See TelegramBotDemo project for more samples.

Use with AddHttpClient<TelegramBot>(...) in web projects, use Polly (or any other you like) to handle transient faults and improve the resilience.

Extensibility

Just describe new request (or data) class:

public class PinChatMessage() : RequestBase<bool>("pinChatMessage")
{
    public string? BusinessConnectionId { get; set; }

    public required IntegerOrString ChatId { get; set; }

    public required long MessageId { get; set; }

    public bool? DisableNotification { get; set; }
}

This works out-of-the-box:

• snake_case property naming (BusinessConnectionId -> business_connection_id);
• DateTimeOffset [de]serialization of unix-time fields;
• use IntegerOrString type for number-or-string fields (like chat_id);
• use InputFile or InputFileOrString types for requests with files (don't forget to pass withFiles: true to RequestBase, check SetWebhook for example);

Installation

Use NuGet package NetTelegramBotApi.

Dependencies

Only System.Text.Json.