Coding⏱️ 2 min read📅 2026-05-31

How to Fix: .NET: Which Exception to Throw When a Required Configuration Setting is Missing?

Choose the correct exception for a missing configuration setting in .NET.

Quick Answer: Use ConfigurationException, as it is specifically designed to handle configuration-related errors.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🛠️ Step-by-Step Verified Fixes
  3. 💡 Conclusion

When working with .NET configuration settings, it's essential to handle missing or invalid values correctly. The problem arises when you're unsure which exception to throw when a required configuration setting is missing.

💡 Why You Are Getting This Error

  • [Cause]

🛠️ Step-by-Step Verified Fixes

Method 1: Using ConfigurationException

  1. Step 1: Create a new instance of the ConfigurationException class.

Method 2: Using ArgumentException

  1. Step 1: Create a new instance of the ArgumentException class.

💡 Conclusion

In this scenario, it's recommended to use the ConfigurationException class. This exception is specifically designed for configuration-related errors and provides more context about the missing setting.

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