Could not load file or assembly Exception from HRESULT: 0x80131040

Finally found the answer!! Go to References –> right cilck on dll file that causing the problem –> select the properties –> check the version –> match the version in properties to web config

<dependentAssembly>
    <assemblyIdentity name="YourDllFile" publicKeyToken="2780ccd10d57b246"               culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-YourDllFileVersion" newVersion="YourDllFileVersion" />
  </dependentAssembly>

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