字符串按指定分隔符分隔

        /// <summary>
        /// 字符串按指定分隔符分隔
        /// </summary>
        /// <param name="str">字符串</param>
        /// <param name="separator">分隔符</param>
        /// <returns></returns>
        public List<string> ConvertToStringList(string str, string separator)
        {
            if (string.IsNullOrWhiteSpace(str))
                return new List<string>();

            var list = str.Split(new[] { separator }, StringSplitOptions.RemoveEmptyEntries);
            return list.Select(a => a.Trim()).Distinct().ToList();
        }