替换以分割的相同字符串

private string noSameStr(string str)
    {
     str  = "|"+str;
     string[] strs = str.Split('|');
     for(int i=0;i     {
    if(strs[i].Trim() != "")
    {
     if(str.Replace("|"+strs[i].Trim()+"|","").Length != str.Length-strs[i].Length)
     {
        str = str.Replace("|"+strs[i].Trim()+"|","|") + "|"+ strs[i].Trim() + "|";
     }
    }
     }
     string nosame = "|";
     strs = str.Split('|');
     for(int i=0;i     {
    if(strs[i].Trim() != "")
    {
     nosame += strs[i].Trim() +"|";
    }
     }
     return nosame;
    }