/// <summary>
        /// sort list using name of original file
        /// </summary>
        public void SortByName()
        {
            PriorityComparer pc = new PriorityComparer(PrioritySortField.NAME);

            this.streamList.Sort(pc);
        }
        /// <summary>
        /// sort list using custom comparer
        /// </summary>
        public void SortByPriority()
        {
            PriorityComparer pc = new PriorityComparer(PrioritySortField.PRIORITY_NAME);

            this.streamList.Sort(pc);
        }