Summary

When a class without parameterless constructor is used in Unwind you get a runtime error: 

System.MissingMethodException: Cannot dynamically create an instance of type 'PD.Waste.Dustbins.Planning.API.Services.DatesCollectionPlanProviderService+UnwoundDatesCollectionPlan'. Reason: No parameterless constructor defined.
at System.RuntimeType.ActivatorCache..ctor(RuntimeType rt)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean wrapExceptions)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MethodTranslators.DefaultIfEmptyMethodToAggregationExpressionTranslator.Translate(TranslationContext context, MethodCallExpression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MethodCallExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, MethodCallExpression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, Expression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.TranslateEnumerable(TranslationContext context, Expression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MethodTranslators.FirstOrLastMethodToAggregationExpressionTranslator.Translate(TranslationContext context, MethodCallExpression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MethodCallExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, MethodCallExpression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, Expression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MemberExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, MemberExpression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.ExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, Expression expression)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MemberInitExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, Expression expression, NewExpression newExpression, IReadOnlyList`1 bindings)
at MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MemberInitExpressionToAggregationExpressionTranslator.Translate(TranslationContext context, MemberInitExpression 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.GroupingWithOutputExpressionStageDefinition`3.RenderProjectStage(IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry, IBsonSerializer`1& outputSerializer)
at MongoDB.Driver.Linq.Linq3Implementation.GroupingWithOutputExpressionStageDefinition`3.Render(IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry, LinqProvider linqProvider)
at MongoDB.Driver.Linq.Linq3Implementation.GroupWithOutputExpressionStageDefinition`3.Render(IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry, LinqProvider linqProvider)
at MongoDB.Driver.AppendedStagePipelineDefinition`3.Render(IBsonSerializer`1 inputSerializer, IBsonSerializerRegistry serializerRegistry, LinqProvider linqProvider)
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.ToListAsync[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken)

Please provide the version of the driver. If applicable, please provide the MongoDB server version and topology (standalone, replica set, or sharded cluster).

This started happening after upgrading the MongoDb csharp driver from 2.18.0 to 2.21.0.

How to Reproduce

Run a query using the Unwind method with class that only has constructor with parameters.

Additional Background

The problem can be avoided by manually setting the default LinqProvider to Linq2.