摘要：string[] a1={"1","2"};string[] a2={"2","3"};Ilist<string> jiaoji=new List<string>;Ilist<string> bingji=new List<string>;//交集foreach(string s1 in a1){foreach(string s2 in a2){if (s1=s2)jiaoji.add(s1);}}// 并集foreach(string s in a1){bingji 阅读全文