Look at your namespaces:
namespace TCSCloud.Domain.RepairOrder.Model
{
public class UpdateRepairOrder : Base.Base
And
using TCSCloud.Domain.RepairOrder;
using Oracle.DataAccess.Client;
namespace TcsCloud.Repository.RepairOrderManagement
{
class RepairOrderManagementRepository
{
UpdateRepairOrder upd = new UpdateRepairOrder();
The fully qualified name for UpdateRepairOrder is:
TCSCloud.Domain.RepairOrder.Model.UpdateRepairOrder
So either change your using to:
using TCSCloud.Domain.RepairOrder.Model;
Or qualify your usage:
Model.UpdateRepairOrder upd = new Model.UpdateRepairOrder();