Translate Text in C# using Visual Studio 2019 - Complete Guide

Automate translations using the WhatsMate Translation REST API

Posted on February 3, 2026   Share on Facebook Share on LinkedIn Share on Twitter Share on Google+

Last reviewed: March 12, 2026  

Automate Text Translation with C# .NET

Need to translate text programmatically in your .NET applications? This guide walks you through translating text using C# and the WhatsMate Translation REST API with Visual Studio 2019. Perfect for .NET developers maintaining legacy systems or working in environments where Visual Studio 2019 is the standard.

💡 Recommendation: If you’re starting a new project or have the flexibility to upgrade, we strongly recommend using Visual Studio 2022 with modern .NET 6+ for better performance, improved tooling, and long-term support. Check out our Visual Studio 2022 tutorial for the latest approach.

This tutorial is for you if: You need to support legacy systems, maintain existing .NET Framework applications, or work in environments where Visual Studio 2019 is the standard.

đź“‹ Prerequisites

Before you begin, ensure you have:

  1. Visual Studio 2019 - Community, Professional, or Enterprise edition
  2. .NET Framework - Version 4.5 or higher
  3. Language codes - Know the ISO language codes for source and target languages

ℹ️ Note: The trial account allows up to 10 translation API calls for learning purposes. Subscribe to a Premium plan for production use.

🎥 Video Walkthrough

đź“ť Step-by-Step Implementation

Follow these steps to perform your first text translation in C#:

1. Copy the C# Template

Start by copying the following source code to the main class in your Console Application in Visual Studio:

2. Configure the Parameters

Customize these key parameters in the C# code:

  • Line 20: Replace with the source language code (e.g., en for English)
  • Line 21: Replace with the target language code (e.g., ta for Tamil)
  • Line 22: Provide the text you want to translate

🔍 Looking for language codes? See the complete listing of supported language codes.

3. 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. Select Framework on the left pane
  4. Find System.Web.Extensions in the middle pane and check the checkbox
  5. Click OK to add the reference

4. Build and Run

Build and run your application in Visual Studio to see the translated result.

🔧 Common Use Cases

This C# integration approach is ideal for:

  • Windows desktop applications - Add translation features to WinForms or WPF apps
  • Windows services - Translate content from background services
  • Enterprise systems - Integrate translation into business applications
  • ASP.NET websites - Translate content for international visitors
  • Business intelligence tools - Translate reports and dashboards

🚀 Get Started Today

Ready to integrate text translation into your .NET applications? You’ll need an account to access the API. Sign up for a Premium plan and start translating within minutes!

Next Steps: Once you’ve mastered basic text translation, explore translating text in other programming languages through the Translation API Getting Started Guide.