Convert string to Decimal in C#

(Convert.ToInt32(clm.OutOfPocketAmount) >= 0 ? (Double.Parse((clm.OutOfPocketAmount.ToString().Substring(1))) / 100).ToString("F2") : clm.OutOfPocketAmount.ToString().Substring(0, 1) + (Double.Parse((clm.OutOfPocketAmount.ToString().Substring(1))) / 100).ToString("F2"))