Software⏱️ 2 min read📅 2026-06-03

How to Fix: Update .NET web service to use TLS 1.2

Update .NET web service to use TLS 1.2

Quick Answer: Try setting the 'SslVersion' property on your .NET web service to 'TLS12'.

To update your .NET web service to use TLS 1.2, you are not alone in facing this issue. Many developers have encountered similar problems and found creative solutions.

⚠️ Common Causes

  • Using an older version of the .NET framework, such as 4.0.

🔧 Proven Troubleshooting Steps

Method 1: Update to .NET Framework 4.6

  1. Step 1: Install the .NET Framework 4.6 update on your server.

Method 2: Use the .NET Framework 4.6 in an In-Memory Application

  1. Step 1: Create a new application pool using the .NET Framework 4.6.

🎯 Final Words

By following these steps, you should be able to update your .NET web service to use TLS 1.2 and establish a secure connection with the other service.

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