public bool GetRangeOf(Double start, Double end, out double ceiling, out double bottom)
{
int startIndex = start <= Dates[0] ? 0 : Dates.FindIndex(x => x >= start);
int endIndex = end >= Dates.Last() ? Count - 1 : Dates.FindIndex(x => x >= end);
if (startIndex < Count && startIndex >= 0 && endIndex < Count && endIndex >= 0)
{
ValueRangeOf(startIndex, endIndex, out ceiling, out bottom);
return(true);
}
else
{
ceiling = -1;
bottom = -1;
return(false);
}
}