Dictionary<string,string> list=new Dictionary<string,string>; //3.0以上版本 foreach(var item in list) {       Console.WriteLine(item.Key+item.Value); } //KeyValuePair<T,K> foreach(KeyValuePair<string,string> kv in list) {       Console.WriteLine(kv.Key+kv.Value); } //通过键的集合取 foreach(string key in list.Keys) {       Console.WriteLine(key+list[key]); } //for循环遍历 List<string> test=new List<string>(list.Keys); for(int i=0;i<list.Count;i++) {       Console.WriteLine(test[i]+list[test[i]]); }