/// <summary>
        /// 截取两个指定字符串中间的字符串列表(开始和结束两个字符串不能相同！)
        /// </summary>
        /// <param name="content"></param>
        /// <param name="startStr"></param>
        /// <param name="endStr"></param>
        /// <returns></returns>
        public static List<string> GetAllSubstring(string content, string startStr, string endStr)
        {
            List<string> resultList = new List<string>();

            int len = content.Length;
            int startLen = startStr.Length;
            int endLen = endStr.Length;
            for (var i = 0; i < len; i++)
            {
                string a = startStr.Substring(0, 1);
                if (content[i].ToString() == a)
                {
                    int startIndex = (i + startLen - 1);
                    if (startIndex < len)
                    {
                        a = content.Substring(i, startLen);
                        if (a.Equals(startStr))
                        {
                            // 循环找出结尾匹配
                            for (int endIndex = startIndex; endIndex < len; endIndex++)
                            {
                                var str = "";
                                for (int j = 0; j < endLen; j++)
                                {
                                    str += content[endIndex].ToString();
                                }
                                if (str == endStr&&endStr!=startStr)
                                {
                                    // 得到长度
                                    int splLen = endIndex - startIndex;
                                    string result = content.Substring(startIndex + 1, splLen - 1);
                                    resultList.Add(result);
                                    break;
                                }
                            }
                        }
                    }
                }
            }
            return resultList;
        }


例如

 var content = "{{first.DATA}}\n\n职位名称：{{job.DATA}}\n公司名称：{{company.DATA}}\n投递时间：{{time.DATA}}\n{{remark.DATA}}";
 var start = "{{";
 var end = "}}";
 var list =CommonHelper.GetAllSubstring(content, start, end);