public string OutputExpiry() { string str = ""; for (int i = Expiry.GetLowerBound(0); i < Expiry.GetUpperBound(0); i++) { str = str + Expiry[i].ToString(CultureInfo.InvariantCulture) + ", "; } str = str + Expiry[Expiry.GetUpperBound(0)].ToString(CultureInfo.InvariantCulture); return(str); }