static void testList()
{
List <person> persons = new List <person>(new person[] { new person("John", 20),
new person("White", 21), new person("Smith", 19), new person("Kitty", 22) });
persons.ForEach(Console.WriteLine);//委托
persons.Sort((p1, p2) =>
{
return(p1.age.CompareTo(p2.age));
});
Console.WriteLine("排序后：");
persons.ForEach(p => { Console.WriteLine(p); });//莱姆达表达式
Console.WriteLine("逆序后：");
persons.Reverse();
persons.ForEach(delegate(person p) { Console.WriteLine(p); });//匿名函数
//删除
Console.WriteLine();
Console.WriteLine("删除年龄为21岁的，共删除了{0}个人", persons.RemoveAll(p => p.age == 21));
persons.ForEach(Console.WriteLine);//委托
Console.WriteLine();
int index = persons.FindIndex(p => p.age < 21);
Console.WriteLine("第一个年龄小于21岁的人是：{0}", persons[index]);
index = persons.FindLastIndex(p => p.age < 21);
Console.WriteLine("最后一个年龄小于21岁的人是：{0}", persons[index]);
Console.WriteLine("查找到年龄为22岁的人是：{0}", persons.Find(p => p.age == 22));
//所有人的年龄加一
List <person> newPerson = persons.ConvertAll(p => new person(p.name, p.age + 1));
Console.WriteLine("所有人的年龄加一");
newPerson.ForEach(Console.WriteLine);
//转换为只读list,加2岁
Console.WriteLine("只读list");
IReadOnlyList <person> readPerson = newPerson.AsReadOnly();
foreach (person item in readPerson)
{
person one = new person(item);
Console.WriteLine(one.AddAge(2));
}
}