ASP.NET: Data access Layer - Retriving Output Param Value

 public GetAllPermissionResponse GetAllPermission(GetAllPermissionRequest request)
        {
            GetAllPermissionResponse response = new DataContract.GetAllPermissionResponse();

            try
            {

                Database db = DatabaseFactory.CreateDatabase(ConstantManager.CONNECTION_NAME);
                using (DbCommand dbCommand = db.GetStoredProcCommand(ConstantManager.SP_PERMISSION_GETALL))
                {
                    db.AddInParameter(dbCommand, "PageNumber", DbType.Int32, request.PageNumber);
                    db.AddInParameter(dbCommand, "Pagesize", DbType.Int32, request.Pagesize);
                    db.AddInParameter(dbCommand, "SortColumn", DbType.String, request.SortColumn);
                    db.AddInParameter(dbCommand, "SortOrder", DbType.String, request.SortOrder);
                    db.AddOutParameter(dbCommand, "RowCount", DbType.Int32, 5);
                  //  db.AddOutParameter(dbCommand, "PageCount", DbType.Int32, 5);

                    PermissionCollection collection = new DataContract.PermissionCollection();
                    PermissionList list = new DataContract.PermissionList();
                    using (IDataReader dataReader = db.ExecuteReader(dbCommand))
                    {

                        while (dataReader.Read())
                        {
                            Permission obj = new DataContract.Permission();
                            if (dataReader["PermissionID"] != DBNull.Value) { obj.PermissionID = Convert.ToInt64(dataReader["PermissionID"]); }
                            if (dataReader["PermissionName"] != DBNull.Value) { obj.PermissionName = Convert.ToString(dataReader["PermissionName"]); }
                            if (dataReader["PermissionDescription"] != DBNull.Value) { obj.PermissionDescription = Convert.ToString(dataReader["PermissionDescription"]); }
                            if (dataReader["IsActive"] != DBNull.Value) { obj.IsActive = Convert.ToBoolean(dataReader["IsActive"]); }
                            if (dataReader["CreatedDate"] != DBNull.Value) { obj.CreatedDate = Convert.ToDateTime(dataReader["CreatedDate"]); }
                            if (dataReader["CreatedBy"] != DBNull.Value) { obj.CreatedBy = Convert.ToInt64(dataReader["CreatedBy"]); }
                            if (dataReader["UpdatedDate"] != DBNull.Value) { obj.UpdatedDate = Convert.ToDateTime(dataReader["UpdatedDate"]); }
                            if (dataReader["UpdatedBy"] != DBNull.Value) { obj.UpdatedBy = Convert.ToInt64(dataReader["UpdatedBy"]); }

                            collection.Add(obj);

                        }
                    }

                    var rowcount = Convert.ToInt32(db.GetParameterValue(dbCommand, "RowCount"));
                   // var pagecount = Convert.ToInt32(db.GetParameterValue(dbCommand, "PageCount"));
                    list.Rows = collection;
                    list.TotalRowCount = rowcount;
                   // list.NoOfPages = pagecount;
                    response.Response = list;
                }


            }
            catch (Exception exception)
            {
                ExceptionManager.HandleDataException(exception, ConstantManager.DATA_EXCEPTIONPOLICY);
            }
            return response;
        }