public static string Convert(double pressure)
        {
            var pressureUnit         = PressureUnit.FromBAR(pressure);
            var pressureUnitObserver = UnitObserverFacade.Instance.PressureUnitObserver;

            switch (pressureUnitObserver.UnitType)
            {
            case UnitPressureTypes.BAR:
                pressure = pressureUnit.AsBAR;
                break;

            case UnitPressureTypes.MPa:
                pressure = pressureUnit.AsMPa;
                break;

            case UnitPressureTypes.PSI:
                pressure = pressureUnit.AsPSI;
                break;
            }
            return(pressure.ToString("0.###"));
        }
        public static double ConvertBack(string str)
        {
            //double tmp = double.Parse(str);
            double.TryParse(str, out double tmp);
            PressureUnit pressureUnit = PressureUnit.FromBAR(tmp);
            var          unitType     = UnitObserverFacade.Instance.PressureUnitObserver.UnitType;

            switch (unitType)
            {
            case UnitPressureTypes.BAR:
                pressureUnit = PressureUnit.FromBAR(tmp);
                break;

            case UnitPressureTypes.MPa:
                pressureUnit = PressureUnit.FromMPa(tmp);
                break;

            case UnitPressureTypes.PSI:
                pressureUnit = PressureUnit.FromPSI(tmp);
                break;
            }
            return(pressureUnit.AsBAR);
        }