public static string FormatCount(long count)
{
if (count < 1000)
return count.ToString();
else if (count < 1000000)
return String.Format("{0:###,000}", count);
else if (count < 1000000000)
return String.Format("{0:###,000,000}", count);
else
return String.Format("{0:###,000,000,000}", count);
}