Get Spreadsheetlight working

Spreadsheetlight is a dotnet library for creating Excel documents with all it’s wonderful features. The Spreadsheetlight nuget has no dependencies on nuget packages, but does have a dependency on Open XML SDK 2.0. This can be installed with the DocumentFormat.OpenXml 1.0.0 nuget.

But after a while everything stopped working, because you tried updating the DocumentFormat.OpenXml to the latest version 2.5.0.

An unhandled exception of type ‘System.TypeLoadException’ occurred.
Additional information: Could not load type ‘DocumentFormat.OpenXml.Spreadsheet.SmartTags’ from assembly ‘DocumentFormat.OpenXml, Version=2.5.5631.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’.


An unhandled exception of type ‘System.IO.FileLoadException’ occurred.
Additional information: Could not load file or assembly ‘DocumentFormat.OpenXml, Version=2.5.5631.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The located assembly’s manifest definition does not match the assembly reference.


  1. Revert back to DocumentFormat.OpenXml version 1.0.0
    Install-Package DocumentFormat.OpenXml -Version 1.0.0
  2. Remove the assemblyBinding from the app.config
        <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
          <!-- Remove dependentAssembly for DocumentFormant.OpenXml -->
            <assemblyIdentity name="DocumentFormat.OpenXml" publicKeyToken="31bf3856ad364e35" culture="neutral" />
            <bindingRedirect oldVersion="" newVersion="2.5.5631.0" />

About erictummers

Working in a DevOps team is the best thing that happened to me. I like challenges and sharing the solutions with others. On my blog I’ll mostly post about my work, but expect an occasional home project, productivity tip and tooling review.
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18 Responses to Get Spreadsheetlight working

  1. Scott Lister says:

    Thank you so much this worked like a charm. I figured out that I needed to revert the version of the OpenXML and I did that but I was really banging my head against the wall trying to figure out that second manifest error message. Thanks again.

  2. Maxence says:

    Thanks!!! You saved my life.

  3. laserlab says:


  4. Thank you Eric! Works great.

  5. Francisco Vera says:

    Thank you, now I can continue with my job.

  6. Harish says:

    Thanks man…!!!

  7. Emil says:

    Got it to work with your help thanks!

  8. Rafik says:


  9. planetregin says:

    Thank you! Thank you! Thank you! Saved quite a lot of frustration. 🙂

  10. Juan Bolanos says:

    Hey Thanks a lot Eric! you saved my day!

  11. Wilson says:

    thanks eric so much!

  12. Anh Lân says:

    You saved the day, sir. Thank you!

  13. Ni says:

    Thank you, you saved my work

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