namespace 匿名函数

{

    /// <summary>

    /// 语法之进化论

    /// </summary>

    class Program

    {

        delegate bool MetherdDeleget(string pStr);

        static void Main(string[] args)

        {

            //m指向匿名函数 delegate(参数列表) {方法体 };

            MetherdDeleget m = delegate(string s) { Console.WriteLine(s); return false; };

            m("匿名函数");

            //lambda

            MetherdDeleget m1 = (s) => { Console.WriteLine(s); return false; };

            m("lambda");

            //进一步1：

            MetherdDeleget m2 = (s) => {  return s=="tom"; };

            Console.WriteLine(m2("tom"));

            //当方法体只有一句话，且有返回值时,写法上可以进一步简化：

            //甚至如果只有一个参数的话() 也不必写

            MetherdDeleget m3 = (s) => s == "tom";

            Console.WriteLine(m3("tom"));

            //////////list的复杂类型排序///////////////////

            List<Person> plist = new List<Person>();

            plist.Add(new Person() { Name = "tom", Age =  });

            plist.Add(new Person() { Name = "jim", Age =  });

            plist.Add(new Person() { Name = "aaa", Age =  });

            plist.Add(new Person() { Name = "bbb", Age =  });

            plist.Add(new Person() { Name = "ccc", Age =  });

            plist.Add(new Person() { Name = "ddd", Age =  });

            foreach(Person eachp in plist.OrderBy(p=>p.Age))

            {

                Console.WriteLine("名字：{0} 年龄：{1}",eachp.Name,eachp.Age);

            }

            foreach (Person eachp in plist.OrderByDescending(p => p.Age))

            {

                Console.WriteLine("名字：{0} 年龄：{1}", eachp.Name, eachp.Age);

            }

            Console.ReadKey();

        }

    }

    class Person

    {

        public string Name { set; get; }

        public int Age { set; get; }

    }

}