.NET Framework Listener and .NET 8 Client

[brckelly]

I'm having an issue where I have a .NET 4.x Framework listening on a Hybrid Relay. When the client is .NET 8 and calls a POST to the hybrid relay, something is happening and the connection is terminated before the client receives all the data. For some reason, this doesn't happen with a GET. It also doesn't happen when the client is .NET 4.x Framework either.

I've put together a pair of sample applications that demonstrate the issue.

https://github.com/brckelly/hybrid-relay-issue

[brckelly]

The issue turned out to be something in the .NET 4.x Framework's WebSockets implementation. When using the .NET Standard 2.0 DLL from the NuGet package, this issue does not happen.

My solution was to reference that DLL directly instead of via NuGet. This is because you can't specific to prefer the .NET Standard 2.0 version from a .NET Framework project.

I also made sure to set UseBuiltInClientWebSocket to false.

I don't understand why the .NET Framework version does not include the WebSockets implementation. It is very purposely being removed.

[mc-wusel]

Hey @brckelly My problem is not specifically related to NET8. I can't even integrate Microsoft.Azure.Relay with NET9. Do you have an idea for me?

[brckelly]

What specifically are you running into?

[mc-wusel]

Hy @brckelly

Requirement. Win 11, .NET9 and Microsoft Visual Studio Community 2022 Version 17.13.2

Microsoft.Azure.Relay cannot be imported. This means that it is not even found in the package manager.

I downloaded all packages manually and then imported them. Now it seems that i can work with them.