public static double ConvertBack(string str)
{
//double tmp = double.TryParse(str);
double.TryParse(str, out double tmp);
SpeedUnit speedUnit = SpeedUnit.FromMillimeterPerSecond(tmp);
var unitType = UnitObserverFacade.Instance.SpeedUnitObserver.UnitType;
switch (unitType)
{
case UnitSpeedTypes.Millimeter_Second:
speedUnit = SpeedUnit.FromMillimeterPerSecond(tmp);
break;
case UnitSpeedTypes.Meter_Second:
speedUnit = SpeedUnit.FromMeterPerSecond(tmp);
break;
case UnitSpeedTypes.Meter_Minute:
speedUnit = SpeedUnit.FromMeterPerMinute(tmp);
break;
case UnitSpeedTypes.Millimeter_Minute:
speedUnit = SpeedUnit.FromMillimeterPerMinute(tmp);
break;
}
return(speedUnit.AsMillimeterPerSecond);
}