private static bool isEqualChars(char i_FirstChar, char i_SecondChar)
        {
            return (i_FirstChar == i_SecondChar);
        }
        private static int firstCharShown(string i_String, char i_CharToSearch, int i_EndPoint, int i_StartPoint, int i_Direction)
        {
            if (i_Direction != -1 || i_Direction != 1)
            {
                return -1;
            }
            while (i_StartPoint < i_EndPoint)
            {
                if (isEqualChars(i_CharToSearch, i_String))
                {
                    i_StartPoint += i_Direction;
                }
            }
            return i_StartPoint;
        }
        private static bool isBalance(string i_String, int i_StartPoint, int i_EndPoint)
        {
            int startPoint;
            int endPoint;
            if (i_String == null)
            {
                return true;
            }
            if (i_StartPoint > i_EndPoint)
            {
                return false;
            }
            if (i_StartPoint == i_EndPoint)
            {
                return true;
            }
            startPoint = firstCharShown(i_String, '{', i_EndPoint, i_StartPoint, 1);
            endPoint = firstCharShown(i_String, '}', i_StartPoint, i_EndPoint, -1);
            if (startPoint < endPoint)
            {
                return isBalance(i_String, startPoint, endPoint);
            }
            else
            {
                return false;
            }
        }