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Editorial Team
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Asked: 2026-06-16T02:58:25+00:00

This is the first time I’m attempting to use NUnit. I’ve installed NUnit into

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This is the first time I’m attempting to use NUnit. I’ve installed NUnit into my Visual Studio project, using NuGet. As you can see in the image below, it references nunit.framework, version 2.6.1.12217…

Visual Studio project

… then I installed the latest Windows app (NUnit-2.6.1.msi)….

Windows App

… and tried to load my test assembly…

Load fail

… but for some reason, it’s expecting version 2.5.10.11092 of nunit.framework.

Any idea if I’m doing something wrong?

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1 Answer

  1. Editorial Team

    Another possibility is that you are referencing a third party assembly that has a reference on a specific version of nunit.framework.

    For example I encountered the same issue because I had a reference to TeamAgile.UnitTestExtensions.dll

    To check if a particular assembly has a reference to nunit.framework.dll use ILDASM and check the extern metadata in the MANIFEST.

    Screenshot of ILDASM

    As you can see from the screenshot, this assembly has a reference to version 2.4.6 of nunit.framework.

    To resolve this issue, add a binding redirect entry to the applications config file to map your old version to your new version.

      <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="nunit.framework" publicKeyToken="96d09a1eb7f44a77" culture="Neutral" />
        <bindingRedirect oldVersion="2.5.10.11092" newVersion="2.6.1.12217" />
      </dependentAssembly>
      ...
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