public static void CalcPi1(int digits)
{
StringBuilder pi = new StringBuilder("3", digits + 2);
if (digits > 0)
{
pi.Append(".");
for (int i = 0; i < digits; i += 9)
{
int nineDigits = NineDigitsOfPi.StartingAt(i + 1);
int digitCount = Math.Min(digits - i, 9);
string ds = string.Format("{0:D9}", nineDigits);
pi.Append(ds.Substring(0, digitCount));
}
}
}
private static string DoWork(decimal workAmount)
{
// int value = 1;
var digits = Convert.ToInt32(workAmount);
StringBuilder pi = new StringBuilder("3", digits + 2);
if (digits > 0)
{
pi.Append(".");
for (int j = 0; j < digits; j += 9)
{
int nineDigits = NineDigitsOfPi.StartingAt(j + 1);
int digitCount = Math.Min(digits - j, 9);
string ds = string.Format("{0:D9}", nineDigits);
pi.Append(ds.Substring(0, digitCount));
}
}
return(pi.ToString());
}