# Telegram.Bot: the .NET client for the Telegram Bot API

> Telegram.Bot is the .NET client for the Telegram Bot API, targeting .NET Standard 2.0 and .NET 6 with .NET 8 or newer recommended. It is the right choice for C# teams that want typed Bot API calls and NuGet distribution, and the wrong one for anyone who needs the full Telegram Client API.

**TelegramBots/Telegram.Bot** — .NET Client for Telegram Bot API

- Repository: https://github.com/TelegramBots/Telegram.Bot
- Website: https://telegrambots.github.io/book
- Stars: 3,645 · Forks: 710
- Language: C#
- License: MIT
- Published: 2026-09-23 · Updated: 2026-09-23 · Language: en
- Canonical page: https://hysenlabs.com/projects/telegrambots-telegram-bot

## The problem Telegram.Bot solves for C# bot developers

The Telegram Bot API is an HTTP-based interface, and calling it by hand means constructing requests, serialising payloads and mapping responses back into types for every method. Telegram.Bot wraps that surface in a .NET client so a C# project can call Bot API methods through typed objects instead of raw HTTP. The README describes the project as the core package, always required for developing Telegram bots, with extension packages layered on top for additional functionality.

The audience is narrow and clear: developers writing bots in C# who want the Bot API, not the full Telegram client protocol. The README states that the Bot API is an HTTP-based interface created for developers building bots for Telegram, and links to the introduction for developers who need to understand what a bot is before writing code. If you are not on .NET, this package is simply not for you, and the README's own framing makes that boundary explicit rather than pretending to be language-neutral.

## How the client maps Bot API methods onto .NET types

The mechanism is a NuGet-distributed client library rather than a server or a daemon. You add the core package to a bot project, and the package exposes the Bot API methods as .NET calls. The repository layout supports this: src/ holds the library, test/ holds the tests, and Telegram.Bot.sln ties the solution together. There is no runtime component to deploy, which means the failure modes you inherit are the ones in your own bot process.

The README also states that the project is fully tested using unit tests and systems integration tests before each release, and that the test cases are self-documenting and serve as examples for Bot API methods. That is a useful design decision for adopters: the tests double as a reference for how each method is meant to be called. It is not the same as a complete API reference, and the README does not claim it is.

One structural point deserves attention. The README carries a Bot API 10.3 badge, so the client tracks a specific version of the upstream API. Anything Telegram adds after that version will not be in the package until a release catches up.

## Installing Telegram.Bot from NuGet and sending a first call

The README points to the Quickstart guide in the book rather than reproducing install steps, so the package identity is what matters here: Telegram.Bot on nuget.org. The README's badge links to the NuGet package page, and the supported platforms section states the project targets .NET Standard 2.0 and .NET 6 at minimum, with .NET 8 or more recent recommended. The README does not give a .NET CLI command here, so the documented path is the NuGet package page it links to.

From there, the book's quickstart is the documented path for a first bot, and the examples repository linked from the README is the place to look for working projects. The README does not spell out the client construction or the token configuration here, so treat the book as the source for those specifics rather than guessing at constructor signatures.

The extension packages are separate installs. If you need the login widget or Passport support, the README lists Telegram.Bot.Extensions.LoginWidget and Telegram.Bot.Extensions.Passport as packages you include in addition to the core package. They are not pulled in automatically.

## Where Telegram.Bot stops: the Bot API boundary

The most consequential limitation is stated by the project itself. The README says that if the Bot API is too limited for your use cases, you can try a Telegram Client API implementation written 100 percent in C#, and links to WTelegramClient. That is an admission that the Bot API surface has a ceiling, and it is the first thing to check against your requirements.

A second limitation is version lag. The client is bound to Bot API 10.3 according to the README badge. If your bot depends on a Bot API feature added after that version, the package will not have it until a release includes it. The recent release list shows v22.4.4 on 2025-02-24, v22.4.3 on 2025-02-16 and v22.4.2 on 2025-02-15, so releases do happen, but the cadence is not something the README promises.

There is also a platform constraint worth naming: .NET Standard 2.0 and .NET 6 are the minimums, with .NET 8 or newer recommended. A team pinned to an older runtime is outside the recommended configuration, and the README does not describe what breaks there.

## Telegram.Bot against a hand-rolled HTTP client

The realistic alternative is not another .NET library but calling the Bot API over HTTP yourself. The Bot API is an HTTP-based interface, so a determined team can POST to the endpoints directly and parse JSON responses. That approach removes the dependency and gives you full control over serialisation, but it also means you reimplement the method surface, the request shapes and the response types that Telegram.Bot already provides.

A second alternative is the one the README itself names: WTelegramClient, a Telegram Client API implementation written 100 percent in C#. The difference in approach is fundamental. Telegram.Bot speaks the Bot API, the HTTP interface designed for bots. WTelegramClient speaks the Client API, which is the protocol used by Telegram clients and reaches further than the Bot API allows. Choosing between them is not a matter of quality; it is a matter of which protocol your bot actually needs. If the Bot API covers your use case, the .NET client is the simpler path. If it does not, the README has already told you where to go.

## Maintenance, licensing and upgrade cost

The repository is not archived, and the last push was on 2026-09-19, which is recent. That supports describing the project as maintained, but the README does not publish a support policy or a compatibility guarantee across major versions. The CHANGELOG.md at the repository root is the file to read before upgrading, and the release history shows several releases within February 2025, which suggests patch-level movement rather than a slow, stable line.

The licence is MIT according to the repository metadata, and the README links to the LICENSE file. MIT is permissive, but the repository also ships a THIRD_PARTY_NOTICES file, which means the dependency tree carries its own notices. If you redistribute a bot binary, that file is the one to read; this is not legal advice, and the notices are the authoritative source.

The upgrade cost is mostly the Bot API version gap. Because the client tracks a specific Bot API version, moving to a newer client release can bring in new API surface and, potentially, changes in how existing calls are shaped. The CHANGELOG.md and the release notes are the places to confirm that before you bump the package reference.

## Conclusion

Adopt Telegram.Bot if you are building a Telegram bot in C# and you are content with the Bot API surface, since the core package is on NuGet and the book covers the quickstart. Do not adopt it if your bot needs the full Telegram Client API, because the README points those users to WTelegramClient instead. Before you commit, verify that the Bot API version you need is covered by the 10.3 badge in the README, and check the CHANGELOG.md for the changes between v22.4.2 and v22.4.4.

## FAQ

### How do I install the Telegram.Bot library?

The README points to the Quickstart guide in the book rather than listing install steps, and the package is published on nuget.org as Telegram.Bot, which is the page the README's NuGet badge links to.

### How do I use a Telegram bot token with Telegram.Bot?

The README does not document token configuration here; it directs readers to the Quickstart guide in the book and to the examples repository. Treat those as the source for how the client is constructed with a token.

### How do I set up a Telegram bot with Telegram.Bot?

The README's Getting Started section says to check the Quickstart guide, and the repository also links a separate examples repository. The supported platforms section states the project targets .NET Standard 2.0 and .NET 6 at minimum, with .NET 8 or more recent recommended.

## Sources

- [License: MIT](https://github.com/TelegramBots/Telegram.Bot/blob/master/LICENSE)
- [Project website](https://telegrambots.github.io/book)
- [README](https://github.com/TelegramBots/Telegram.Bot/blob/master/README.md)
- [Releases](https://github.com/TelegramBots/Telegram.Bot/releases)
- [TelegramBots/Telegram.Bot on GitHub](https://github.com/TelegramBots/Telegram.Bot)

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Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/telegrambots-telegram-bot