NumericValidationAttribute.cs

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using System;
using AnalyzeRe.Utilities;
 
namespace AnalyzeRe.Attributes
{
    [AttributeUsage(AttributeTargets.Property, Inherited = true, AllowMultiple = true)]
    public abstract class NumericValidationAttribute : ValidationAttribute
    {
        protected double GetValue(object value)
        {
            try
            {
                if (value is MonetaryUnit)
                    return ((MonetaryUnit)value).value;
                else
                    return Convert.ToDouble(value);
            }
            catch (InvalidCastException e)
            {
                throw new InvalidCastException("The " + GetType().NiceTypeName() +
                    " cannot be used for properties of type " + value.GetType().NiceTypeName(), e);
            }
        }
    }
}