<PackageReference Include="Polly" Version="8.6.4" />

Polly.Caching.Ttl

public struct Ttl
Represents a time-to-live for a given cache item.
namespace Polly.Caching { public struct Ttl { public TimeSpan Timespan; public bool SlidingExpiration; public Ttl(TimeSpan timeSpan); public Ttl(TimeSpan timeSpan, bool slidingExpiration); } }