public MeetingElement(MeetingElementKey key, DateTime start, bool isUpTo, decimal duration)
{
Key = key;
Start = start;
IsUpTo = isUpTo;
Duration = duration;
}
public MeetingElement(MeetingElementKey key, DateTime start, bool isUpTo, decimal duration, string title)
: this(key, start, isUpTo, duration)
{
Title = title;
}