FileLoadException: Could not load file or assembly 'NHibernate, Version=5.1.0.0

[arjundate]

In C# application having both dependencies with FluentNHibernate v2.1.2 with NHibernate v5.5.2 raising runtime error - 'FileLoadException: Could not load file or assembly 'NHibernate, Version=5.1.0.0'.

Can someone please help me on this?

[hazzik]

Add binding redirect

[hazzik]

Something like this:

<configuration>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Nhibernate" publicKeyToken="aa95f207798dfdb4"/>
        <bindingRedirect oldVersion="5.1.0.0" newVersion="5.5.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

[fredericDelaporte]

To add some more context, this trouble is .Net Framework specific. You would not have it with .net 5 or higher, or .net core, whatever the version. So, another way of solving it is migrating away from .Net Framework. Also see https://nickcraver.com/blog/2020/02/11/binding-redirects/.