ntment
    {
        <span class="keyword">public</span> Appointment()
        {
        }

        <span class="keyword">public</span> Appointment( <span class="keyword">string</span> title, <span class="keyword">string</span> description, DateTime start, DateTime end, <span class="keyword">bool</span> allDay = <span class="keyword">false</span> )
        {
            Id = Guid.NewGuid().ToString();
            Title = title;
            Description = description;
            Start = start;
            En