MongoDB.Bson.Serialization.Serializers.InterfaceSerializer.Deserialize C# (CSharp) Method

        public override object Deserialize(
            BsonReader bsonReader,
            Type nominalType,
            Type actualType,
            IBsonSerializationOptions options)
        {
            if (!nominalType.IsInterface)
            {
                var message = string.Format("Nominal type must be an interface, not {0}.", nominalType.FullName);
                throw new ArgumentException(message, "nominalType");
            }

            if (actualType == nominalType)
            {
                var message = string.Format("Unable to determine actual type of object to deserialize. NominalType is the interface {0}.", nominalType);
                throw new Exception(message);
            }

            var serializer = BsonSerializer.LookupSerializer(actualType);
            return serializer.Deserialize(bsonReader, nominalType, actualType, options);
        }