private DeviceDataViewModel Copy(Guid pId)
        {
            var itemCopy = _deviceData.Clone() as DeviceData;

            if (itemCopy != null)
            {
                itemCopy.parentId   = pId;
                itemCopy.DeviceInfo = DeviceContext.Instance.DeviceInfos.Find(pId);
            }
            DeviceContext.Instance.DeviceDatas.AddOrUpdate(itemCopy);
            DeviceContext.Instance.SaveChanges();
            return(new DeviceDataViewModel(itemCopy));
        }