Could not load file or assembly 'Microsoft.Practices.Unity'

The binding redirect should be pointed to a proper assembly version.

For your case version 2.1.505.0 should be used! 

<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
    <assemblyIdentity name="Microsoft.Practices.Unity" publicKeyToken="31bf3856ad364e35" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-2.1.505.0" newVersion="2.1.505.0" />
  </dependentAssembly>
</assemblyBinding>

2.1.505.2 cannot be specified because of next reason:

enter image description here

Unity assembly 2.1.505.2 has different versions specified in the AssemblyFileVersion and AssemblyVersion.

CLR is working with the AssemblyVersion and AssemblyFileVersion is ignored but NuGet is working with the AssemblyFileVersion!

So that's why you have this difference!

Please use AssemblyVersion


The problem was another Microsoft dll that refers to the old version of unity. I found this out be accident be checking the namespaces of every referenced dll, and found another dll that contained namespaces with "unity".

Updating:

  • Microsoft.Practices.EnterpriseLibrary.Common
  • Microsoft.Practices.EnterpriseLibrary.Validation

to latest released versions resolved the problem.

I hope I save the day for some lost soul out there who's also pulling his hair out over this issue... :)

Tags:

C#

Assembly Loading

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