IIS manager GUI not working (Method not found)

  • Thread starter Thread starter PradeepSharma
  • Start date Start date
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PradeepSharma

Issue: IIS manager GUI not working.



When user is opening up IIS manager and trying to browse the application pools then we are getting below error message.



"Method not found: Microsoft.Web.Administration.StartModeMicrosoft.Web.Administration.ApplicationPool.get_StartMode()".



Cause: Server is loading older version of "Microsoft.Web.Administration.dll" from C:\Windows\assembly\GAC_MSIL\Microsoft.Web.Administration\7.0.0.0__31bf3856ad364e35 GAC folder.



Resolution:


  1. Please take the backup of C:\Windows\assembly\GAC_MSIL\Microsoft.Web.Administration\7.0.0.0__31bf3856ad364e35 folder.
  2. After that copy "C:\Windows\System32\inetsrv\Microsoft.Web.Administration.dll" dll and paste it into C:\Windows\assembly\GAC_MSIL\Microsoft.Web.Administration\7.0.0.0__31bf3856ad364e35 folder.
  3. After that you should be able to browse the Application Pool in IIS Manager.

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