private int getIndex(COMDT_FRIEND_INFO info, ListView <COMDT_FRIEND_INFO> list, bool ingore_worldid = false) { if (list != null) { for (int i = 0; i < list.Count; i++) { if (UT.BEqual_ACNT_UNIQ(list[i].stUin, info.stUin, ingore_worldid)) { return(i); } } } return(-1); }