TessaDateTimePickerCalendarDateStart - свойство

public DateTime? CalendarDateStart { get; set; }

Public Property CalendarDateStart As DateTime?
	Get
	Set

public:
property Nullable<DateTime> CalendarDateStart {
	Nullable<DateTime> get ();
	void set (Nullable<DateTime> value);
}

member CalendarDateStart : Nullable<DateTime> with get, set