public void SetCount(string value)
{
Mileage mileage = GetPrev();
int count;
if (!int.TryParse(value.Replace(" ", ""), out count))
{
throw new InvalidCastException();
}
int prevCount = 0;
if (mileage != null)
{
int.TryParse(mileage.Count, out prevCount);
if ((count < prevCount) && (Date > mileage.Date))
{
throw new InvalidConstraintException();
}
}
if (count >= 1000000)
{
throw new OverflowException();
}
_count = count;
}
public string PrevToString()
{
Mileage mileage = GetPrev();
return((mileage == null) ? "0" : mileage.ToString());
}