CSHARP=5572: Fix SelectMany after rebasing on main.

Author: rstam

src/MongoDB.Bson/Serialization/Serializers/DictionarySerializerBase.cs

@@ -499,20 +499,15 @@ obj is DictionarySerializerBase<TDictionary, TKey, TValue> other &&
         /// <inheritdoc/>
         public bool TryGetItemSerializationInfo(out BsonSerializationInfo serializationInfo)
         {
-            if (_dictionaryRepresentation is DictionaryRepresentation.ArrayOfArrays or DictionaryRepresentation.ArrayOfDocuments)
-            {
-                var representation = _dictionaryRepresentation == DictionaryRepresentation.ArrayOfArrays
-                    ? BsonType.Array
-                    : BsonType.Document;
-                var keySerializer = _lazyKeySerializer.Value;
-                var valueSerializer = _lazyValueSerializer.Value;
-                var keyValuePairSerializer = new KeyValuePairSerializer<TKey, TValue>(representation, keySerializer, valueSerializer);
-                serializationInfo = new BsonSerializationInfo(null, keyValuePairSerializer, keyValuePairSerializer.ValueType);
-                return true;
-            }
-
-            serializationInfo = null;
-            return false;
+            var representation = _dictionaryRepresentation == DictionaryRepresentation.ArrayOfArrays
+                ? BsonType.Array
+                : BsonType.Document;
+            var keySerializer = _lazyKeySerializer.Value;
+            var valueSerializer = _lazyValueSerializer.Value;
+            var keyValuePairSerializer = new KeyValuePairSerializer<TKey, TValue>(representation, keySerializer, valueSerializer);
+
+            serializationInfo = new BsonSerializationInfo(null, keyValuePairSerializer, keyValuePairSerializer.ValueType);
+            return true;
         }
 
         /// <inheritdoc/>

src/MongoDB.Driver/Linq/Linq3Implementation/KnownSerializerFinders/KnownSerializerFinderVisitor.cs

@@ -24,7 +24,6 @@ internal partial class KnownSerializerFinderVisitor : ExpressionVisitor
     private bool _isMakingProgress = true;
     private readonly KnownSerializerMap _knownSerializers;
     private int _oldKnownSerializersCount = 0;
-    private int _pass = 0;
     private readonly ExpressionTranslationOptions _translationOptions;
     private bool _useDefaultSerializerForConstants = false; // make as much progress as possible before setting this to true
 
@@ -34,8 +33,6 @@ public KnownSerializerFinderVisitor(ExpressionTranslationOptions translationOpti
         _translationOptions = translationOptions;
     }
 
-    public int Pass => _pass;
-
     public bool IsMakingProgress => _isMakingProgress;
 
     public void EndPass()