C#一维string数组去掉去重算法

 public static void Purge(ref List<string>needToPurge)
        {
           
            for(int i=0;i<needToPurge.Count-1;i++)
            {
                string deststring=needToPurge[i];
                for(int j=i+1;j<needToPurge.Count;j++)
                {
                    if(deststring.CompareTo(needToPurge[j])==0)
                    {
                        needToPurge.RemoveAt(j);
                        continue;
                    }
                }
            }
比如needToPurge={"Dong Ya-Li","FAN Jiao-Jiao","YANG Ying-Juan","FAN Jiao-Jiao"};
调用此函数后needToPurge={"Dong Ya-Li","FAN Jiao-Jiao","YANG Ying-Juan"}