/// <summary>
        /// Returns the next Class name for the Theme
        /// </summary>
        /// <returns></returns>
        public string GetNextClassName()
        {
            if (ClassNames == null || ClassNames.Count == 0)
            {
                return(NAME_UNAVAILABLE);
            }

            string nextName;

            do
            {
                nextName = ClassNames.Dequeue();
            } while (string.IsNullOrEmpty(nextName));

            //put the name at the end so we keep looping
            ClassNames.Enqueue(nextName);
            return(nextName);
        }