https://mongodb.github.io/mongo-csharp-driver/2.19/apidocs/html/M_MongoDB_Bson_Serialization_Serializers_DynamicDocumentBaseSerializer_1_TryGetValueForMember.htm
DynamicDocumentBaseSerializer(T).TryGetValueForMember Method
Tries to get the value for a member. Returns true if the member should be serialized.
method