<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="EphemeralMongo6" Version="0.1.3" />
    <PackageReference Include="MongoDB.Driver" Version="2.19.0" />
  </ItemGroup>

</Project>

using System;
using System.Linq;
using EphemeralMongo;
using MongoDB.Bson;
using MongoDB.Driver;
using MongoDB.Driver.Linq;

Console.Write("Running MongoDB");
using var runner = MongoRunner.Run();
Console.WriteLine($" on {runner.ConnectionString}");
var settings = MongoClientSettings.FromConnectionString(runner.ConnectionString);
if (Enum.TryParse<LinqProvider>(args.FirstOrDefault(), out var provider))
{
    settings.LinqProvider = provider;
}
Console.WriteLine($"Using LinqProvider {settings.LinqProvider}");

var client = new MongoClient(settings);
var collection = client.GetDatabase("my-db").GetCollection<BsonDocument>("my-collection");
var document = new BsonDocument
{
    ["_id"] = ObjectId.GenerateNewId(),
    ["Name"] = "Me",
};
collection.InsertOne(document);
var me = collection.Find(new BsonDocument()).Project(d => new Person(d)).Single();
Console.WriteLine($"[{me.Id}] {me.Name}");

public class Person
{
    public Person(BsonDocument document)
    {
        Id = document["_id"].AsObjectId;
        Name = document["Name"].AsString;
    }

    public ObjectId Id { get; set; }

    public string Name { get; set; }
}

Running MongoDB on mongodb://127.0.0.1:60766
Using LinqProvider V2
[63d846b35c677f6f0e813308] Me

Running MongoDB on mongodb://127.0.0.1:60866
Using LinqProvider V3
Unhandled exception. MongoDB.Driver.Linq.ExpressionNotSupportedException: Expression not supported: new Person(d) because constructor parameter document does not match any property.
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.NewExpressionToAggregationExpressionTranslator.GetMatchingPropertyName(NewExpression expression, String constructorParameterName)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.NewExpressionToAggregationExpressionTranslator.<>c__DisplayClass0_0.<Translate>b__1(ParameterInfo p)
   at System.Linq.Enumerable.SelectArrayIterator`2.ToArray()
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.NewExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, NewExpression expression)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, Expression expression)
   at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.TranslateLambdaBody(TranslationContext context, LambdaExpression lambdaExpression, IBsonSerializer parameterSerializer, Boolean asRoot)
   at MongoDB.Driver.Linq.Linq3Implementation.LinqProviderAdapterV3.TranslateExpressionToProjection[TInput,TOutput](Expression`1 expression, IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry, ExpressionTranslationOptions translationOptions)
   at MongoDB.Driver.Linq.Linq3Implementation.LinqProviderAdapterV3.TranslateExpressionToFindProjection[TSource,TProjection](Expression`1 expression, IBsonSerializer`1 sourceSerializer, IBsonSerializerRegistry serializerRegistry)
   at MongoDB.Driver.FindExpressionProjectionDefinition`2.Render(IBsonSerializer`1 sourceSerializer, IBsonSerializerRegistry serializerRegistry, LinqProvider linqProvider)
   at MongoDB.Driver.MongoCollectionImpl`1.CreateFindOperation[TProjection](FilterDefinition`1 filter, FindOptions`2 options)
   at MongoDB.Driver.MongoCollectionImpl`1.FindSync[TProjection](IClientSessionHandle session, FilterDefinition`1 filter, FindOptions`2 options, CancellationToken cancellationToken)
   at MongoDB.Driver.MongoCollectionImpl`1.<>c__DisplayClass46_0`1.<FindSync>b__0(IClientSessionHandle session)
   at MongoDB.Driver.MongoCollectionImpl`1.UsingImplicitSession[TResult](Func`2 func, CancellationToken cancellationToken)
   at MongoDB.Driver.MongoCollectionImpl`1.FindSync[TProjection](FilterDefinition`1 filter, FindOptions`2 options, CancellationToken cancellationToken)
   at MongoDB.Driver.FindFluent`2.ToCursor(CancellationToken cancellationToken)
   at MongoDB.Driver.IAsyncCursorSourceExtensions.Single[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken)
   at MongoDB.Driver.IFindFluentExtensions.Single[TDocument,TProjection](IFindFluent`2 find, CancellationToken cancellationToken)