Software⏱️ 2 min read📅 2026-05-30

How to Fix: Working with a .NET DLL from C++, that DLL loading two different versions of the same DLL, why is that a problem?

DLL loading issues with .NET8 DLL and multiple versions of the same DLL.

Quick Answer: The problem occurs because .NET is using a mechanism called 'side-by-side' assembly loading, which can lead to conflicts between different versions of the same DLL.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🚀 How to Resolve This Issue
  3. ✨ Wrapping Up

When working with a .NET DLL from C++, the issue of loading two different versions of the same DLL can be attributed to several factors. In this scenario, your colleague has created a .NET8 DLL that refers to Microsoft.Extensions.Logging.Abstractions.dll.

⚠️ Common Causes

  • The shared directory.

🚀 How to Resolve This Issue

Method 1: DLL Hashing

  1. Step 1: Use the .NET CLI to generate a hash for the DLL and store it in your C++ code.

Method 2: DLL Versioning

  1. Step 1: Update the AssemblyInfo.cs file in your .NET8 DLL to specify a unique version number for each DLL.

✨ Wrapping Up

By implementing one of these methods, you can resolve the issue of loading two different versions of the same DLL and ensure a stable and reliable application.

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