<PackageReference Include="System.Reactive" Version="6.0.2" />

System.Reactive.Concurrency.IScheduledItem<TAbsolute>

public interface IScheduledItem<TAbsolute>
Represents a work item that has been scheduled.
namespace System.Reactive.Concurrency { public interface IScheduledItem<[System.Runtime.CompilerServices.Nullable(2)] TAbsolute> { TAbsolute DueTime { get; } void Invoke(); } }