public static string ToFriendlyString(this BillPayPeriod bp)
 {
     if (bp == BillPayPeriod.OnceOff)
     {
         return("Once Off");
     }
     return(Enum.GetName(typeof(BillPayPeriod), bp));
 }
 public static int?ToMonth(this BillPayPeriod bp)
 {
     if (bp == BillPayPeriod.OnceOff)
     {
         return(null);
     }
     if (bp == BillPayPeriod.Monthly)
     {
         return(1);
     }
     if (bp == BillPayPeriod.Quarterly)
     {
         return(3);
     }
     return(12);
 }