public List<AttributesBasicInfo> GetAttributesList(int offset, int limit, string attributeName, System.Nullable<bool> isRequired, System.Nullable<bool> comparable, System.Nullable<bool> isSystem, int storeId, int portalId, string cultureName, string userName)
 {
     try
     {
         ItemAttributesManagementSqlProvider obj = new ItemAttributesManagementSqlProvider();
         return obj.GetItemAttributes(offset, limit, attributeName, isRequired, comparable, isSystem, storeId, portalId, cultureName, userName);
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }