public void ImportUSDCurves(List<USDCurve> lst)
 {
     try
       {
       using (LoanPriceEntities context = new LoanPriceEntities())
       {
           foreach (var item in lst)
           {
               context.AddToUSDCurves(item);
           }
           context.SaveChanges();
       }
       }
       catch (Exception ex)
       {
       throw ex;
       }
 }