Coding⏱️ 3 min read📅 2026-06-03

How to Fix: How to fix "Referenced assembly does not have a strong name" error

Error occurs when a weakly named assembly is referenced in a project with strong naming.

Quick Answer: Yes, you need to sign the third-party assembly.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🚀 How to Resolve This Issue
  3. 💡 Conclusion

The 'Referenced assembly does not have a strong name' error occurs when a strongly named assembly is referenced in a project that was created with a weakly named assembly. This issue affects .NET applications, particularly those targeting .NET Framework versions prior to 4.5.

This error can be frustrating for developers as it prevents the application from being built or deployed. However, there are several methods to resolve this issue and ensure compatibility with both strongly and weakly named assemblies.

🛑 Root Causes of the Error

  • The primary reason for this error is that the project was created with a weakly named assembly, while the referenced assembly has a strong name. When Visual Studio attempts to build or deploy the application, it cannot find the strong name of the referenced assembly, resulting in the error.
  • An alternative cause could be that the referenced assembly's strong name is not correctly configured in the project properties or that there are issues with the assembly's manifest.

🚀 How to Resolve This Issue

Registering the Strong Name

  1. Step 1: Open the Visual Studio project properties by right-clicking on the project and selecting Properties.
  2. Step 2: In the Project Designer, navigate to the 'Signing' tab and click on the 'Edit' button next to 'Strong Name Key File'.
  3. Step 3: Enter a strong name key file or create a new one using the 'New' option. This will update the assembly's manifest with its strong name.

Using the .NET Framework 4.5 or Later

  1. Step 1: If possible, upgrade the project to target the .NET Framework 4.5 or later. This version of the framework includes support for both strongly and weakly named assemblies.
  2. Step 2: Alternatively, you can configure the project to use the 'Allow Strong Names' option in the project properties. However, this may require additional configuration and testing.

💡 Conclusion

To resolve the 'Referenced assembly does not have a strong name' error, try registering the strong name of the referenced assembly using Visual Studio's signing feature or upgrade to the .NET Framework 4.5 or later. By following these steps, you should be able to successfully build and deploy your application.

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