问题
I am working on integrating Google Cloud PubSub into my c# project, I used NuGet to install 1.0.0-beta11, no errors at all. When I run my project and when it reaches the code that uses pubsub, I get the following error:
An unhandled exception of type 'System.IO.FileLoadException' occurred in
Google.Api.Gax.dll
Additional information: Could not load file or assembly 'Google.Apis.Auth, Version=1.21.0.0, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
NuGet did install all the dependencies including Google.Apis.Auth.dll, but it's 1.27.1. I have tried everything I could think of, including grabbing 1.21.0 of that dll and using that, but no success. I have been able to run the .net sample just fine with no error.
Any thoughts? Let me know if you need more info
回答1:
Okay, I've found the reference to Google.Apis.Auth 1.21.0 - it's in the Grpc.Auth NuGet package.
If you just add a reference to the Grpc.Auth DLL, you'll get this kind of failure - but if you manage all the dependencies via NuGet, I'd expect it to be okay - it should add assembly binding redirects for you.
Without knowing your exact setup, it's quite tricky to say more than that - it could be that your library needs assembly binding redirects, but the application is in control of them... and in particular, if your application only has a reference to the library DLL, that would cause the problem.
As a workaround, you could either manually add the assembly binding redirects (the exact way of doing that will depend on the application type) or just add a reference to Google.Cloud.PubSub.V1 in the application as well as the library, at which point NuGet will do all the dependency handling for you.
回答2:
You can append the following to your app.config file.
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Google.Apis.Auth" publicKeyToken="4b01fa6e34db77ab" culture="neutral" />
<bindingRedirect oldVersion="1.21.0.0-1.35.1.0" newVersion="1.35.1.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
来源：https://stackoverflow.com/questions/44771019/unable-to-run-google-cloud-pubsub-in-c-dll-problems