[TestMethod]
        public void TestMethod2()
        {
            string str = "aaa|||bbb|||ccc";

            var rr= MySplit(str, "|||");
            str = "aaa|||bbb|||ccc|||ccc|||ccc|||ccc|||dddddddfewfwefwefwe";
            rr = MySplit(str, "|||");
            str = "aaa345534534534534ddddfewfwefwefwe"
 
;
            rr = MySplit(str, "|||");
        }
        public List<string> MySplit(string sourcestr, string splitstr)
        { 
            List<string> res = new List<string>();
            int sln = sourcestr.Length;
            int ln = splitstr.Length;
            int start = 0
 
;
            for (int i = 0; i <sln; i++)　{
                bool issplitstr = true;
                //判斷後面一部分是不是分割字串
                for (int j = 0; j < ln; j++)　{
                    if (sourcestr[i+j] == splitstr[j] ) {
                        continue;
                    } else {
                        issplitstr = false
 
;
                        break;
                    }
                }
                if (issplitstr){
                   res.Add( sourcestr.Substring(start, i - start) );//加入新的分割字串
                   start = i+ln;//+ln 跳過分割符本身
                }
            }
            res.Add(sourcestr.Substring(start, sln-start));//加速最後一段，或者無分隔符的一段
            return res; 
        }