Fixed transaction exception bug

transactinos that were explicitly closed, were throwing an exception, because it would be closing transaction twice

RMDataManagerLibrary/DataAcccess/SaleData.cs

@@ -70,6 +70,8 @@ namespace RMDataManagerLibrary.DataAcccess
 
                         sql.SaveDataInTransaction("dbo.spSaleDetailInsert", item);
                     }
+
+                    sql.CommitTransaction();
                 }
                 catch
                 {