public int CompareTo(IPeriod p)
{
if (p == null)
{
throw new ArgumentNullException("p");
}
else if (Equals(p))
{
return(0);
}
else if (StartTime.LessThan(p.StartTime))
{
return(-1);
}
else if (StartTime.GreaterThanOrEqual(p.StartTime))
{
return(1);
}
throw new Exception("An error occurred while comparing Period values.");
}
