Software⏱️ 2 min read📅 2026-05-31

How to Fix: C# 6.0 Features Not Working with Visual Studio 2015

C# 6.0 features not working with Visual Studio 2015.

Quick Answer: The issue is caused by the null-conditional operator (.?.) being disabled in VS 2015. To enable it, go to Tools > Options > C# > Advanced and check the box next to 'Enable Null Conditional Operator'.

📋 Table of Contents

  1. 🔍 Why This Happens
  2. 🚀 How to Resolve This Issue
  3. 💡 Conclusion

C# 6.0 features, such as the null-conditional operator and string whitespace checks, are not working with Visual Studio 2015 due to a compatibility issue.

🔍 Why This Happens

  • The issue is caused by the fact that Visual Studio 2015 does not support C# 6.0 features out of the box.

🚀 How to Resolve This Issue

Method 1: Enable C# 7.0 Features

  1. Step 1: Open the Tools menu in Visual Studio 2015 and select Options.

Method 2: Install .NET Framework 4.6 or Later

  1. Step 1: Download and install the .NET Framework 4.6 or later from the official Microsoft website.

💡 Conclusion

By following these steps, you should be able to enable C# 6.0 features in Visual Studio 2015 and resolve the CS1525 error.

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