object ISumable.Sum(object sum)
{
if (sum is string)
{
return(sum);
}
TimeSec sec = (TimeSec)sum;
if (sec == Empty)
{
return(this);
}
if (this == Empty)
{
return(sec);
}
if ((sec == MaxValue) || (this == MaxValue))
{
return(MaxValue);
}
if (!(sec == MinValue) && !(this == MinValue))
{
return(sec + this);
}
return(MinValue);
}
static TimeSec()
{
Empty = new TimeSec(TimeSpan.MinValue);
Zero = new TimeSec(TimeSpan.Zero);
Midnight = new TimeSec(0x18, 0, 0);
MinValue = Empty;
MaxValue = new TimeSec(TimeSpan.MaxValue);
}