Fix failure to create GrpcChannel under Wine compatibility layer (including Steam Proton and Apple Game Porting Toolkit)

[mayuki]

Wine compatibility layers such as Steam Deck/Steam OS Proton and the Apple Game Porting Toolkit return Windows 8 or later as the OS version, but does not implement the GetCurrentApplicationUserModelId API.

As a result, an issue occurs where it is not possible to create a GrpcChannel due to an EntryPointNotFoundException.

System.TypeInitializationException: The type initializer for 'Grpc.Net.Client.Internal.OperatingSystem' threw an exception. ---> System.EntryPointNotFoundException: GetCurrentApplicationUserModelId assembly:<unknown assembly> type:<unknowntype> member:(null)
  at (wrapper managed-to-native) Grpc.Net.Client.Internal.Native.GetCurrentApplicationUserModelId(uint&,byte[])
  at Grpc.Net.Client.Internal.Native.IsUwp (System.String frameworkDescription, System.Version version) [0x00028] in <cfd57654def7423a841054daeb7fc483>:0
  at Grpc.Net.Client.Internal.OperatingSystem..ctor () [0x00049] in <cfd57654def7423a841054daeb7fc483>:0
  at Grpc.Net.Client.Internal.OperatingSystem..cctor () [0x00000] in <cfd57654def7423a841054daeb7fc483>:0

For example, if using Grpc.Net.Client in a game developed with Unity, the game will not be playable on Steam Deck.

[JamesNK]

Do you have a link to a web page that discusses this? It would be good to include that in the comment so people can look their if they want more information.

[mayuki]

This originated from a report from one of our clients, and I'm sorry to say there is no similar discussion on the web.

[JamesNK]

Thanks for the good description and fix.