public void AddDefinition(OptionDefinition od)
{
if (string.IsNullOrEmpty(od.LongName))
throw new Exception("LongName is a required field");
if (_optionDefinitions.Where(o => string.Compare(o.LongName, od.LongName, true) == 0)
.Count() > 0)
throw new Exception(od.LongName + " is already defined");
_optionDefinitions.Add(od);
}