AWS SDK for .NET Documentation
Persistent Property
AmazonAmazon.RDS.ModelOptionGroupOptionPersistent Did this page help you?   Yes   No    Tell us about it...
A persistent option cannot be removed from the option group once the option group is used, but this option can be removed from the db instance while modifying the related data and assigning another option group without this option.
Declaration Syntax
C#
public bool Persistent { get; set; }

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)