public override bool Equals(object obj)
        {
            CTermE other = obj as CTermE;

            if (other == null)
            {
                return(false);
            }
            else
            {
                Debug.Assert(obj.ToString() == ToString()); // real assert
                return(true);
            }
        }
        public static CTermE GetInstance()
        {
            CTermE region = new CTermE();

            return(region);
        }