Units of Measure Validator for C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Linq.Expressions;

namespace HDLibrary.UnitsOfMeasure
{
    [Serializable]
    public class InvalidUnitConversionException : Exception
    {
        public InvalidUnitConversionException(string sourceUnit, string targetUnit) { }
        public InvalidUnitConversionException(string sourceUnit, string targetUnit, string message) : base(message) { }
        public InvalidUnitConversionException(string message, Exception inner) : base(message, inner) { }
        protected InvalidUnitConversionException(
          System.Runtime.Serialization.SerializationInfo info,
          System.Runtime.Serialization.StreamingContext context)
            : base(info, context) { }
    }
}