File Not Found – Assembly Binding Error


I am sure many of you might have come across the “File Not Found” error related to the Assembly Binding.


FileNotFound Error


The best way to diagnose is to use the Fusion Log Assembly Viewer. The tool FUSLOGVW.exe is located at C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin

You can also access this tool from your Visual Studio Command Prompt.


Fusion Assembly Log Viewer Settings:

FusLogVw Settings

  • Set your Log Settings as per the screenshot above. Set your own custom log path.
  • Close the Fusion Assembly Log Viewer
  • Once you are done with those settings make sure you delete all the Temporary ASP.NET Files from the “Windows\Microsoft.NET\Framework\v2.0.50727” folder.
  • Do an IISRESET
  • Start the Fusion Assembly Log Viewer
  • Open your ASP.Net web application and recreate the erroring scenario.
  • Click Refresh button in the Log Viewer
  • Look for App_Web_error.aspx entry..and move up in the list you will find the dlls that the application is trying to bind. Double click it and you will find the details of the binding error.

FusionLog Error Output



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