FusionCacheSystemTextJsonSerializer and ImmutableHashSet

[sychare]

Might be a stupid question, but FusionCacheSystemTextJsonSerializer doesn't error when serialising ImmutableHashSet but it ends up storing an empty object in Redis.

I'd have expected this to have maybe thrown an exception, but actually not sure why it isn't considered a failure in this case.

Anybody else hit any oddities with things that you assume have serialised correctly, but then blow up when pulling them from distributed cache?

[sychare]

Quick follow-up, I was completely on the wrong track here, as I've now identified the issue is that Tuple<> is the problem, not the ImmutableHashSet it contained.

dotnet/runtime#68264 & dotnet/runtime#70352 for more info, but this isn't a problem with FusionCache at all.