c# - SignalR 2.0.2 and Owin 2.0.0 dependency conflict

Question

I'm trying to get SignalR working in an MVC5 project with individual accounts.

The MVC project has by default Owin 2.0.0 and all of the Owin.* components are also 2.0.0.

So I used NuGet to get all the SignalR packages, it automatically resolved dependancies and downloaded v 2.0.2.

The project throws an error on startup with the following message:

Could not load file or assembly 'Microsoft.Owin, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

I also tried upgrading Owin to 2.1.0 but that didn't help either.

Has anyone faced the same problem and what was the solution?

Answer 1

You can update this references to the lastest version I found (now is 2.1.0):

Install-Package Microsoft.Owin -Version 2.1.0
Install-Package Microsoft.Owin.Security -Version 2.1.0

And make sure your Web.config have these binding redirects for version 2.1.0:

<configuration>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.1.0.0" newVersion="2.1.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.1.0.0" newVersion="2.1.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

Or you can update this references to version 2.0.1:

Install-Package Microsoft.Owin -Version 2.0.1
Install-Package Microsoft.Owin.Security -Version 2.0.1

And make sure your Web.config have these binding redirects for version 2.0.1:

<configuration>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.1.0" newVersion="2.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.1.0" newVersion="2.0.1.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>