Silverlight 5

WinRT

	public abstract interface IThreadPoolTimer
	public abstract virtual TimeSpan Delay { get; }
	public abstract virtual TimeSpan Period { get; }
	public abstract virtual void Cancel();

	public abstract sealed class ThreadPool
	: __ComObject
	static public IAsyncAction RunAsync(WorkItemHandler handler);
	static public IAsyncAction RunAsync(WorkItemHandler handler, WorkItemPriority priority);

	public sealed class ThreadPoolTimer
	: __ComObject, IThreadPoolTimer
	public virtual TimeSpan Delay { get; }
	public virtual TimeSpan Period { get; }
	public virtual void Cancel();
	static public ThreadPoolTimer CreatePeriodicTimer(TimerElapsedHandler handler, TimeSpan period);
	static public ThreadPoolTimer CreateTimer(TimerElapsedHandler handler, TimeSpan delay);

	public sealed class TimerElapsedHandler
	: MulticastDelegate, ICloneable, ISerializable
	public virtual void Invoke(ThreadPoolTimer timer);

	public sealed class WorkItemHandler
	: MulticastDelegate, ICloneable, ISerializable
	public virtual void Invoke(IAsyncAction operation);

	public sealed enum WorkItemPriority
	: IComparable, IFormattable, IConvertible
	{ Low, Normal, High }