Send Telegram Group Messages in C# using Visual Studio 2019 - Complete Guide

Automate Telegram Group Messaging with C# .NET

Looking to send messages to Telegram groups from your .NET applications? This guide walks you through sending Telegram group messages using C# and the WhatsMate Telegram Gateway REST API. Perfect for .NET developers building Windows applications, services, or enterprise solutions with Visual Studio 2019.

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

📋 Prerequisites

Before you begin, ensure you have:

1. A WhatsMate Telegram Gateway Premium account - Required for group messaging API access
2. Group setup - Create a Telegram group and add the gateway as a member
3. Visual Studio 2019 - Community, Professional, or Enterprise edition
4. .NET Framework - Version 4.5 or higher
5. Basic C# knowledge - Familiarity with Visual Studio and C# development

⚠️ Important: You need a Premium account to send messages to Telegram groups. The gateway must be added to your Telegram group before it can send messages. Sign up for a Premium account to enable group messaging capabilities.

🎥 Video Walkthrough

📝 Step-by-Step Implementation

Follow these steps to send your first Telegram group message from a C# application:

1. Prepare Your Telegram Group

Before coding, set up your Telegram group:

1. Create a new group in your Telegram client
2. Add the secret gateway number to the group (you can add other members too)
3. Send a message in the group from your personal Telegram account - this helps the gateway learn about the group

2. Copy the C# Template

Copy the following source code to the main class in your Console Application in Visual Studio:

3. Configure Key Parameters

Customize these essential parameters in the C# code:

• Line 10: Replace YOUR_INSTANCE_ID_HERE with your Telegram gateway instance ID
• Lines 11-12: Update YOUR_CLIENT_ID_HERE and YOUR_CLIENT_SECRET_HERE with your Client ID and Secret
• Line 19: Specify the group name, group admin phone number, and your message content

4. Add Required Reference

Add the “System.Web.Extensions” reference to your project:

1. Right-click on your project node in the Solution Explorer panel
2. Choose “Add” → “Reference…”
3. Choose “Framework” on the left pane
4. Look for “System.Web.Extensions” in the middle pane and check the checkbox
5. Click OK

5. Build and Run Your Application

Build and run the application in Visual Studio to deliver your Telegram group message.

🔧 Common Use Cases

This C# group messaging integration is ideal for:

• Team coordination - Automate notifications to work or project groups
• Customer engagement - Broadcast updates to customer support groups
• Event management - Coordinate event participants through group messages
• Educational purposes - Send learning materials to student groups
• Windows services - Build background services with group messaging capabilities

🚀 Get Started Today

Ready to integrate Telegram group messaging into your C# applications? You’ll need a Premium account to access the group messaging API. Sign up for a Premium account and start sending group messages within minutes!

Next Steps: Once you’ve mastered basic group text messaging, explore advanced features like sending images to groups, documents to groups, or voice notes to groups through the WhatsMate Telegram Gateway API documentation.