cannout use ImmutableList<T>.IsEmpty Property in Filter

Working with Data Drivers
, ,
1

when I use IsEmpty in Filter it throw Exception below.

System.NotSupportedException: Serializer for System.Collections.Immutable.ImmutableList`1[System.String] does not represent members as fields.

Here is the source code.

BsonSerializer.RegisterGenericSerializerDefinition(typeof(ImmutableList<>), typeof(ImmutableListSerializer<>));

var client = new MongoClient("mongodb://localhost:27017");
var database = client.GetDatabase("tdb");
var collection = database.GetCollection<Test>("tests");

List<Test> data = [
    new Test("1", ["a", "b"]),
    new Test("2", []),
    new Test("3"),
];

var result1 = data.Where(t => t.Names != null && t.Names.IsEmpty);
foreach (var t in result1)
{
    Console.WriteLine(t.ToString());
}

try
{
    collection.InsertMany(data);

    // var filter = Builders<Test>.Filter.Where(t => t.Names != null && t.Names.Count == 0); // works
    var filter = Builders<Test>.Filter.Where(t => t.Names != null && t.Names.IsEmpty); // not works
    var result2 = collection.Find(filter).ToEnumerable();
    foreach (var t in result2)
    {
        Console.WriteLine(t.ToString());
    }
}
catch (Exception ex)
{
    Console.WriteLine(ex);
}
finally
{
    database.DropCollection("tests");
}

public record Test(string Id, ImmutableList<string>? Names = null);

public class ImmutableListSerializer<TValue> : EnumerableInterfaceImplementerSerializerBase<ImmutableList<TValue>, TValue>
{
    protected override object CreateAccumulator() => new List<TValue>();

    protected override ImmutableList<TValue> FinalizeResult(object accumulator)
        => [.. ((List<TValue>)accumulator)];
}