How to send a voice note file to a Telegram group in C# using Visual Studio 2019

Using the WhatsMate Telegram Gateway REST API

This article shows you how to send a voice note file (e.g. an OPUS file) to a registered Telegram group in Microsoft’s .NET language: C# using Visual Studio 2019.

If you are using Visual Studio 2022, please read this tutorial instead.

To send a Telegram message containing a voice note file in C# using Visual Studio 2019, do this:

  1. First, learn how to send a simple text message to a group on the official site.
  2. With the above knowledge, you can now download our sample code.
  3. Locate the file cs/group-send-telegram-opus.cs.
  4. Study the C# source code and customize the TODO/FIXME lines.
  5. Run the C# program in Visual Studio to send your group your first OPUS file!

Happy coding :)