String.Join 和 Distinct 方法 去除字符串中重复字符

Qualys项目中写到将ServerIP以“,”分割后插入数据库并将重复的IP去除后发送到服务器进行Scan,于是我写了下面的一段用来剔除重复IP:

 //CR#1796870 modify by v-yangwu, remove the IPs which are repeated.
                 string[] arrayIP = ipAll.Split(',');
                 List<string> listIP = new List<string>();
                 foreach (string ip in arrayIP)
                 {
                     if (!listIP.Contains(ip))
                     {
                         listIP.Add(ip);
                     }
                 }
                 string ipAllNew = listIP[];
                 for (int ipaccount = ; ipaccount < listIP.Count(); ipaccount++)
                 {
                     ipAllNew += "," + listIP[ipaccount];
                 }
                 ipAll = ipAllNew;
                 //CR#1796870 End

RemoveSameIPs

项目组PM给我做的codeReview，给我做了Code improvement，把这是几行代码，用下面一行代码给替换掉了，真牛掰！

ipAll = String.Join(",", ipAll.Split(',').Distinct());

谢谢陈老师！留此纪念！