.NET Core 3.1 System.Interactive.Async assembly issues

[TheSpy]

Trying to run FirebaseAuth ListUsersAsync method an error is thrown
System.IO.FileNotFoundException: Could not load file or assembly 'System.Interactive.Async, Version=3.2.0.0, Culture=neutral, PublicKeyToken=94bc3704cddfc263'. The system cannot find the file specified.

code snippet

var e = _firebaseAuth.ListUsersAsync(null).GetAsyncEnumerator(); try { while (await e.MoveNextAsync()) { ... } } finally { if (e != null) { await e.DisposeAsync(); } }

Project has a dependency of a package Google.Cloud.PubSub.V1 ≥ 2.0.0, which is probably using latest Gax

Anyone knows how to fix this?

[hiranya911]

Yes, it appears a version conflict between different versions of Gax. The 2.x version of Gax that we depend on has the following dependency:

<PackageReference Include="System.Interactive.Async" Version="3.2.0" />

This has been removed in the Gax 3.x version. We can start the migration process for latest Gax but it will likely be a while. In the meantime perhaps you can take an explicit dependency on the above assembly and make sure it's available to your app?

[TheSpy]

Thanks for reply.

I have tried that, unfortunately another error is thrown saying

System.NotImplementedException: The method or operation is not implemented.
at Google.Api.Gax.PagedAsyncEnumerable`2.GetAsyncEnumerator(CancellationToken cancellationToken)

[hiranya911]

Can you try raising this at https://github.com/googleapis/gax-dotnet?

Given that the issue is caused by their libraries, they might have known workarounds. Only other immediate solution I can think of is downgrading your other PubSub dependency to something that uses Gax 2.x

[TheSpy]

Downgrading to an older PubSub version did help. This is good enough until client migrated to latest GAX.

Thanks for you help.

[liongkj]

Downgrading to an older PubSub version

Hi @TheSpy , do you mind explaining how to downgrade to older pubsub version? I tried google but i still have no idea

[liongkj]

@hiranya911 Could you please give me some pointers. I am stuck at this for weeks now,

[hiranya911]

@liongkj you will have to go through your dependencies, and downgrade anything that depends on Gax 2.0.

[Bartizan]

as far as I can see it is resolved and could be closed. Thanks

[TheSpy]

I confirm that a release https://github.com/firebase/firebase-admin-dotnet/releases/tag/v2.0.0 has this issue resolved.
Thank you!