public PositionLength(PositionLengthUnit unit) { Unit = unit; }
public PositionLength(PositionLengthUnit unit) { Unit = unit; }
public PositionLength(PositionLengthUnit unit, double value) : this(unit) { Value = value; }
public PositionLength(PositionLengthUnit unit, double value) : this(unit) { Value = value; }