/// <summary>
        /// Returns violated brush.
        /// </summary>
        /// <returns>Violated brush.</returns>
        public static ImageBrush GetViolatedBrush()
        {
            if (_violatedBrush == null)
            {
                _violatedBrush = (ImageBrush)Application.Current.FindResource(VIOLATED_ICON_SOURCE_NAME);
                _violatedBrush = (ImageBrush)_violatedBrush.GetCurrentValueAsFrozen();
            }

            return _violatedBrush;
        }