RepetitionPattern Class

[XmlRootAttribute("Repetition", Namespace = "http://schemas.microsoft.com/windows/2004/02/mit/task", 
	IsNullable = true)]
public sealed class RepetitionPattern : IDisposable, 
	IXmlSerializable, IEquatable<RepetitionPattern>, INotifyPropertyChanged

// Create a time trigger with a repetition
var tt = new TimeTrigger(new DateTime().Now.AddHours(1));
// Set the time in between each repetition of the task after it starts to 30 minutes.
tt.Repetition.Interval = TimeSpan.FromMinutes(30); // Default is TimeSpan.Zero (or never)
// Set the time the task will repeat to 1 day.
tt.Repetition.Duration = TimeSpan.FromDays(1); // Default is TimeSpan.Zero (or never)
// Set the task to end even if running when the duration is over
tt.Repetition.StopAtDurationEnd = true; // Default is false;

// Do the same as above with a constructor
tt = new TimeTrigger(new DateTime().Now.AddHours(1)) { Repetition = new RepetitionPattern(TimeSpan.FromMinutes(30), TimeSpan.FromDays(1), true) };