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Goals

Attempting to iterate through an IEnumerable collection of RealmObjects and perform some action.
<!--- What are you trying to achieve? -->

Expected Results

For this to work.
<!--- What did you expect to happen? -->

Actual Results

ERROR: Select not supported

The stack trace leads me to believe that the two foreach statements are both calling ToArray under the covers, which triggers the error.

I've been following the supported LINQ documentation like gospel, so I'm aware of what is and is not supported. Is it as simple as doing any of these operations on an IEnumerable collection that contains RealmObjects just does not work?
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Steps to Reproduce

1. Resolve a ThreadSafeReference to an IQueryable collection containing RealmObjects
2. Using query syntax, run a select statement to filter the object to a single attribute (another collection)
3. Order result of 2 by count and find firstOrDefault()
4. Try to iterate through collection.
   <!--- What are steps we can follow to reproduce this issue? -->

Code Sample

var categoryAttributes= Realm.GetInstance(Configuration).ResolveReference(threadSafeFilteredProducts)
var attributeGroupWithMaxAttributes = from ca in categoryAttributes orderby ca.Count() select ca.FirstOrDefault();

//Error, Select not supported on all of these
var testArr = attributeGroupWithMaxAttributes.ToArray();
foreach (CategoryAttribute a in attributeGroupWithMaxAttributes);
attributeGroupWithMaxAttributes?.ToList().ForEach(...);

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Version of Realm and Tooling

• Realm Object Server Version: ? (you can see this as well in Studio once connected to a Realm instance) 4.2
• Flavor:
  • [ X ] Realm Cloud
  • [ ] Self-Hosted
• Server OS & Version: ? (e.g. CentOS 6) Windows 10 version should not matter
• Client SDK Version: ? 4.2
• Client OS & Version: ? Windows 10