protected override void ValidateCore(Property property, string value, IList<ValidationResult> results)
        {
            var elementProperty = property as ElementProperty;
            if (elementProperty == null) return;

            var lowerBoundTypeProperty = elementProperty.DeclaringElement.Properties.Single(p => p.PropertyName == "LowerBoundType");
            var upperBoundTypeProperty = elementProperty.DeclaringElement.Properties.Single(p => p.PropertyName == "UpperBoundType");


            if (((RangeBoundaryType)lowerBoundTypeProperty.Value) == RangeBoundaryType.Ignore ||
                ((RangeBoundaryType)upperBoundTypeProperty.Value) == RangeBoundaryType.Ignore)
            {
                return;
            }

            IComparable senderBound = (IComparable)property.ConvertFromBindableValue(value);
            IComparable boundToCheck = GetOtherBoundary(elementProperty);
            bool isInvalid;
            if (property.PropertyName == "UpperBound")
            {
                isInvalid = CheckBounds(senderBound, boundToCheck);
            }
            else
            {
                isInvalid = CheckBounds(boundToCheck, senderBound);
            }

            if (isInvalid)
            {
                results.Add(new PropertyValidationResult(property, string.Format(CultureInfo.CurrentCulture, Resources.RangeBoundValidatorErrorMessage)));
            }
        }
 protected override void ValidateCore(Property property, string value, IList<ValidationResult> results)
 {
     var internalValue = (string)property.ConvertFromBindableValue(value);
     if (string.IsNullOrEmpty(internalValue))
     {
         results.Add(new PropertyValidationResult(property, Resources.DatabaseSettingsDoesntHaveDefaultDatabase, true));
     }
 }