C# list to dictionary

示例：

新建一个类：

    public class Lang
    {
        public string En;
        public string Ch;
    }

实例化并转为字典：

  List<Lang> langs = new List<Lang>();
            langs.Add(new Lang() { Ch = "书籍",En = "Book" });
            langs.Add(new Lang() { Ch = "电影",En = "Film" });
            var dict = langs.ToDictionary(x => x.Ch,x => x.En);

            var value = dict["书籍"];