System.NullReferenceException#155

### Version Information | Software | Version(s) | | ------------------------| ---------- | | NuGet Package | latest | | Driver Windows OS? | yes | | Visual Studio? | no, Rider | | RethinkDB Server | 2.3.6 | | Server Windows OS? | yes | Query: ` var user = await R.Db("lrp_core").Table("users").Get("someProcedurallyFoundKey").RunAtomAsync<User>(_conn); ` ### What is the expected behavior? Running a query should not throw a NullReferenceException. ### What is the actual behavior? Running a query throws a NullReferenceException. ### Please provide a unit test that demonstrates the bug.  Not sure how to create a Unit test for this edge case, but one potential route would be to use mono, and load an assembly with assembly.load() and see if running a query inside the loaded assembly throws a null reference exception ### Other notes on how to reproduce the issue? The project I am running is inside a framework called FiveM, which loads the assemblies at runtime in mono with Assembly.Load(). Perhaps a good way to reproduce would be to load a project inside mono with Assembly.Load() and attempt a query. The query is never actually run on the server, which could provide some valuable information on where the null reference occurs. ### Any possible solutions? Potentially, find out why there is a nullreference in my runtime environment but not others (net framework, net core, etc) ### Can you identify the location in the driver source code where the problem exists? No clue, but I am 100% certain the null reference is nowhere in my code, as its the query specifically that causes the null reference. I do have a suspicion that ReThinkDB is having trouble referencing my User object but I am not sure. ### If the bug is confirmed, would you be willing to submit a PR? Potentially, I have limited knowledge on how RethinkDB works. Yes / No _(Help can be provided if you need assistance submitting a PR)_ Yes