public class BrokenSerializers : IDisposable
    {
        public class GuidDocument
        {
            public Guid Id { get; set; }
            public string Name { get; set; }
            public IEnumerable<GuidInnerDocument> Documents { get; set; }
        }        public class GuidInnerDocument
        {
            public Guid Id { get; set; }
            public Guid AnotherId { get; set; }
        }        private IMongoClient _client;
        private IMongoDatabase _database;
        private IMongoCollection<GuidDocument> _collection;        [Fact]
        public async Task GuidRepresentationModeV2ToV3()
        {
            BsonDefaults.GuidRepresentationMode = GuidRepresentationMode.V3;
            BsonSerializer.RegisterSerializer(typeof(Guid), new GuidSerializer(GuidRepresentation.Standard));            BsonClassMap.RegisterClassMap<GuidDocument>(x => x.AutoMap());
            BsonClassMap.RegisterClassMap<GuidInnerDocument>(x => x.AutoMap());            _client = new MongoClient("mongodb://localhost:27017/?replicaSet=rs1");
            _database = _client.GetDatabase("SomeTestDb");
            _collection = _database.GetCollection<GuidDocument>("SomeCollection");
            var documentId = Guid.NewGuid();
            var anotherDocumentId = Guid.NewGuid();            await _collection.InsertOneAsync(new GuidDocument
            {
                Id = documentId,
                Documents = new[]
                {
                    new GuidInnerDocument {Id = Guid.NewGuid(), AnotherId = anotherDocumentId},
                    new GuidInnerDocument {Id = Guid.NewGuid(), AnotherId = Guid.NewGuid()},
                    new GuidInnerDocument { Id = Guid.NewGuid(), AnotherId = Guid.NewGuid() }
                }
            });            var documentQuery2 = await _collection
                .Aggregate()
                .Match(x => x.Documents.Any(y => y.AnotherId == anotherDocumentId))
                .Project(x => new
                {
                    DocumentId = x.Id,
                    Document = x.Documents.First(y => y.AnotherId == anotherDocumentId)
                })
                .SingleOrDefaultAsync();            Assert.Equal(documentId, documentQuery2.DocumentId);
            Assert.Equal(anotherDocumentId, documentQuery2.Document.AnotherId);
        }        public void Dispose()
        {
            new MongoClient("mongodb://localhost:27017/?replicaSet=rs1").DropDatabase("SomeTestDb");
        }
    }
}

System.InvalidOperationException
This constructor can only be used when BsonDefaults.GuidRepresentationMode is V2.
   at MongoDB.Bson.BsonBinaryData..ctor(Guid guid)
   at MongoDB.Bson.BsonTypeMapper.Convert(Object value, Conversion conversion)
   at MongoDB.Bson.BsonTypeMapper.TryMapToBsonValue(Object value, BsonValue& bsonValue)
   at MongoDB.Bson.BsonTypeMapper.MapToBsonValue(Object value)
   at MongoDB.Bson.BsonValue.Create(Object value)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateConstant(Expression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateValue(Expression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateOperation(BinaryExpression node, String op, Boolean canBeFlattened)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateValue(Expression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateWhere(WhereExpression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateValue(Expression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TryTranslateFirstResultOperator(PipelineExpression node, BsonValue& result)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslatePipeline(PipelineExpression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateValue(Expression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateMapping(ProjectionMapping mapping)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateNew(NewExpression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.TranslateValue(Expression node)
   at MongoDB.Driver.Linq.Translators.AggregateLanguageTranslator.Translate(Expression node, ExpressionTranslationOptions translationOptions)
   at MongoDB.Driver.Linq.Translators.AggregateProjectTranslator.TranslateProject(Expression expression, ExpressionTranslationOptions translationOptions)
   at MongoDB.Driver.Linq.Translators.AggregateProjectTranslator.Translate[TDocument,TResult](Expression`1 projector, IBsonSerializer`1 parameterSerializer, IBsonSerializerRegistry serializerRegistry, ExpressionTranslationOptions translationOptions)
   at MongoDB.Driver.ProjectExpressionProjection`2.Render(IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry)
   at MongoDB.Driver.PipelineStageDefinitionBuilder.<>c__DisplayClass32_0`2.<Project>b__0(IBsonSerializer`1 s, IBsonSerializerRegistry sr)
   at MongoDB.Driver.DelegatedPipelineStageDefinition`2.Render(IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry)
   at MongoDB.Driver.AppendedStagePipelineDefinition`3.Render(IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry)
   at MongoDB.Driver.AppendedStagePipelineDefinition`3.Render(IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry)
   at MongoDB.Driver.MongoCollectionImpl`1.AggregateAsync[TResult](IClientSessionHandle session, PipelineDefinition`2 pipeline, AggregateOptions options, CancellationToken cancellationToken)
   at MongoDB.Driver.MongoCollectionImpl`1.UsingImplicitSessionAsync[TResult](Func`2 funcAsync, CancellationToken cancellationToken)
   at MongoDB.Driver.IAsyncCursorSourceExtensions.SingleOrDefaultAsync[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken)
   at Intigriti.Mongo.IntegrationTests.BrokenSerializers.GuidRepresentationModeV2ToV3() in D:\code\library\Mongo\Intigriti.Mongo.IntegrationTests\BrokenSerializers.cs:line 116
   at Xunit.Sdk.TestInvoker`1.<>c__DisplayClass48_1.<<InvokeTestMethodAsync>b__1>d.MoveNext() in C:\Dev\xunit\xunit\src\xunit.execution\Sdk\Frameworks\Runners\TestInvoker.cs:line 264
--- End of stack trace from previous location ---
   at Xunit.Sdk.ExecutionTimer.AggregateAsync(Func`1 asyncAction) in C:\Dev\xunit\xunit\src\xunit.execution\Sdk\Frameworks\ExecutionTimer.cs:line 48
   at Xunit.Sdk.ExceptionAggregator.RunAsync(Func`1 code) in C:\Dev\xunit\xunit\src\xunit.core\Sdk\ExceptionAggregator.cs:line 90