Dominic Bolin

Bug: Key comparer is not preserved in serializing/deserializing immutable collections

1

Test code: ``` var config = new SerializerConfig(); config.UseImmutableFormatters(); var s = new CerasSerializer(config); var o = ImmutableDictionary.Empty.WithComparers(StringComparer.OrdinalIgnoreCase); var x = s.Serialize(o); var y = s.Deserialize(x); Console.WriteLine(o.KeyComparer.GetType()); Console.WriteLine(y.KeyComparer.GetType()); ``` Actual...

Don't emit a null byte marker for non-nullable reference types Based on metadata described in https://github.com/dotnet/roslyn/blob/master/docs/features/nullable-metadata.md --- Arrays are problematic for this, because while they offer the most potential benefit,...