How to send a PDF file to a WhatsApp group in C# (.NET) using Visual Studio 2022

Using the WhatsMate WhatsApp Gateway REST API

This article shows you how to send a document (e.g. a PDF file, an MP4 file, a WAV file, etc.) document to a WhatsApp group in Microsoft’s .NET language: C# using Visual Studio 2022.

If you are using Visual Studio 2019, please read this tutorial instead.

To send a PDF document to a WhatsApp group in C#, 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_vs2022/send-pdf-group.cs.
  4. Study the C# source code and customize the TODO/FIXME lines.
    • Among other things, you must name your group creatively. Otherwise, the group may not receive the message.
  5. Run the C# program in Visual Studio to send your group the first PDF file!

Happy coding :)