【.net core】ToDictionary函数使用方法

List<string> list = new List<string>();
list.add("111");
list.add("222");
list.add("333");
list.add("444");
int i = 1;
list .ToDictionary(a => i++, a => a) ;
//输出字典{1: "111", 2: "222",3: "333", 4: "444"}