How Do I Enable Assembly Bind Failure Logging (Fusion) in .NET?

Troubleshooting .NET Assembly Binding Issues with Fusion Logging

.NET's assembly binding process can sometimes present challenges. Fusion logging provides detailed information to diagnose these problems. To activate this crucial logging feature, follow these steps:

1. Access the Registry: Open the Registry Editor (regedit.exe) and navigate to the following key:

   HKEY_LOCAL_MACHINESOFTWAREMicrosoftFusion

2. Configure Logging Parameters: Add or modify the following DWORD (32-bit) values, setting each to '1':

   • ForceLog
   • LogFailures
   • LogResourceBinds
   • EnableLog

3. Specify Log Location: Create a new String Value named LogPath. Set its data to the desired log directory path (e.g., C:\FusionLogs\). Crucially, ensure the directory exists and the path ends with a backslash ().

4. Restart Your Application: The changes will only take effect after restarting the application experiencing binding issues.

5. Review the Logs: Examine the log files generated in the specified directory. These logs contain detailed information about assembly resolution attempts, including successes and failures.

6. Disable Logging (Important): Remember to disable Fusion logging (set all DWORD values to 0) after troubleshooting to prevent excessive log file generation.

This detailed logging will help pinpoint the root cause of assembly binding failures in your .NET applications. Remember to disable logging once the issue is resolved.

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