Send Audio Files over Telegram in C#/.NET - Complete Guide

Automate Telegram Audio Sharing with C#/.NET

Looking to automate audio delivery, voice messages, or sound notifications from your C#/.NET applications? This guide walks you through sending audio files (MP3 format) to Telegram users using C# and the WhatsMate Telegram Gateway REST API. Perfect for .NET developers, Windows application builders, and automation enthusiasts who want to integrate audio content delivery into their C#-based workflows.

Note for Visual Studio 2022 users: If you’re using Visual Studio 2022, please read this updated tutorial instead.

📋 Prerequisites

Before you begin, ensure you have:

1. A WhatsMate Telegram Gateway account - Required for API access
2. Recipient registration - Each recipient must register with the Gateway first
3. Visual Studio 2019 - .NET development environment (or compatible IDE)
4. Basic C# knowledge - Familiarity with C# programming and .NET framework
5. Audio file ready - Have the MP3 file you want to send available locally
6. System.Web.Extensions reference - Required for JSON serialization

⚠️ Important: Recipients must register with the WhatsMate Telegram Gateway before they can receive messages. Unregistered users will not receive any messages from the Gateway. Registration instructions are available on the official WhatsMate site.

📝 Step-by-Step Implementation

Follow these steps to send your first audio file to a Telegram user from a C# application:

1. Copy the C# Code Template

Start by copying the following source code into your C# file:

2. Configure a few Parameters

Customize these key parameters in the C# code:

• Lines 10-12: Replace YOUR_INSTANCE_ID, YOUR_CLIENT_ID_HERE, and YOUR_CLIENT_SECRET_HERE with your gateway instance ID, Client ID, and Secret
• Line 20: Replace 12025550105 with the target phone number (including the country code)
• Line 22: Replace C:\\TEMP\\ocean-waves.mp3 with the path to your MP3 audio file
• Line 23: Replace anyname.mp3 with the desired filename for the audio
• Line 24: Replace Enjoy the nature with an optional caption for your audio

3. Add Required Reference

Ensure your project references System.Web.Extensions for JSON serialization:

1. Right-click on References in Solution Explorer
2. Select Add Reference
3. Find and check System.Web.Extensions
4. Click OK

4. Send Your Audio File

Build and run your C# application in Visual Studio to deliver your audio to Telegram.

🔧 Common Use Cases

This automation approach is ideal for:

• System monitoring alerts - Send audio alerts for server status or monitoring events from Windows applications
• Customer service automation - Deliver audio responses or information to clients through Telegram
• Audio notifications - Send sound alerts or voice messages to Telegram from C# applications
• Integration with .NET audio processing - Combine with C# libraries that generate or modify audio files for Telegram delivery
• Voice message automation - Deliver pre-recorded voice messages or announcements from .NET systems

🚀 Get Started Today

Ready to automate your audio sharing over Telegram with C#? You’ll need a trial account to access the API. Sign up for a 2-week trial and start sending audio files within minutes!

Next Steps: Once you’ve mastered basic audio sending, explore advanced features like sending images, documents, or group messages through the WhatsMate Telegram Gateway API documentation.