System.Reactive.Concurrency.DefaultScheduler
namespace System.Reactive.Concurrency
{
public sealed class DefaultScheduler : LocalScheduler, ISchedulerPeriodic
{
public static DefaultScheduler Instance { get; }
public IDisposable SchedulePeriodic<[Nullable(2)] TState>(TState state, TimeSpan period, Func<TState, TState> action);
}
}