【C#Lanmoda式】

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication2
{
    public class Person
    {
        public int Age { get; set; }
        public string Name { get; set; }

    }
    class Program
    {
        public static List PersonsList()// Person List 
        {
            List persons = new List();
            for (int i = 0; i < 7; i++)
            {
                Person p = new Person() { Name = i + " ", Age = 8 - i, };

                persons.Add(p);
            }
            return persons;
        }

        static void Main(string[] args)
        {
            List persons = PersonsList();
            List persons1 = persons.Where(p => p.Age > 6).ToList();   // Age>6 Person 
            Person per = persons.SingleOrDefault(p => p.Age == 1);  //Age=1 people 
            List persons2 = persons.Where(p => p.Name.Contains("2")).ToList();   // Name Person 
            foreach (Person p in persons2)
            {
                Console.WriteLine(p.Name);
            }

        }

    }
}