List＜T＞属性和方法使用

//@author：shark_ddd
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;//使用函数来减少长度namespace List_T
{class Student{public string Name { get; set; }public int Age { get; set; }}internal class Program{static void PrintStudents(List<Student> students){foreach (Student student in students){Console.Write("Name：" + student.Name);Console.WriteLine(", Age：" + student.Age);}}static void PrintNumbers(List<int> numbers){foreach (int number in numbers){Console.Write(" " + number);}Console.WriteLine();}static void PrintStrings(List<string> strings){foreach (string str in strings){Console.Write(" " + str);}Console.WriteLine();}static void Main(string[] args){List<Student> studentList = new List<Student>{new Student { Name = "Alice", Age = 20 },new Student { Name = "Ben", Age = 18 },new Student { Name = "Clark", Age = 18 }};Console.WriteLine("Students:");PrintStudents(studentList);Console.WriteLine("=================================================================================");// 创建数字列表List<int> numberList = new List<int> { 1, 2, 3, 4, 5 };// 在数字列表末尾加入 6numberList.Add(6);// 在数字列表末尾加入 7、8、9numberList.AddRange(new List<int> { 7, 8, 9 });Console.WriteLine("now_List:");PrintNumbers(numberList);// 获取数字列表中的所有偶数List<int> evenNumbers = numberList.FindAll(n => n % 2 == 0);Console.WriteLine("获取的偶数有:");PrintNumbers(evenNumbers);// 删除数字列表中的 9numberList.Remove(9);Console.WriteLine("now_List:");PrintNumbers(numberList);// 删除数字列表中索引为 0 的元素numberList.RemoveAt(0);Console.WriteLine("now_List:");PrintNumbers(numberList);// 打印第一个Console.WriteLine("First_number:" + numberList.First());Console.WriteLine("=================================================================================");// 水果列表List<string> fruitList = new List<string> { "apple", "banana", "cherry" };// 在索引为 1 的位置插入 orangefruitList.Insert(1, "orange");Console.WriteLine("now_Fruit:");PrintStrings(fruitList);// 复制水果列表从索引 0 开始的两个元素到 myFruit 数组中，并从数组的索引 0 开始存入string[] myFruit = new string[2];fruitList.CopyTo(0, myFruit, 0, 2);Console.WriteLine("myFruit:");Console.WriteLine(string.Join(" ", myFruit));// 复制水果列表从索引 1 开始的三个元素到 subList 中List<string> subList = fruitList.GetRange(1, 3);Console.WriteLine("subList:");PrintStrings(subList);// 翻转水果列表元素排序顺序fruitList.Reverse();Console.WriteLine("now_Fruit:");PrintStrings(fruitList);// 对水果列表元素进行排序fruitList.Sort();Console.WriteLine("now_Fruit:");PrintStrings(fruitList);// 清空水果列表fruitList.Clear();Console.WriteLine("now_Fruit:");PrintStrings(fruitList);Console.ReadLine();}}
}//转换成字符串string.Join
//using System;
//using System.Collections.Generic;
//using System.Linq;
//using System.Text;
//using System.Threading.Tasks;//namespace List_T
//{
//    class Student
//    {
//        public string Name { get; set; }
//        public int Age { get; set; }
//    }//    internal class Program
//    {
//        static void Main(string[] args)
//        {
//            List<Student> studentList = new List<Student>
//            {
//                new Student { Name = "Alice", Age = 20 },
//                new Student { Name = "Ben", Age = 18 },
//                new Student { Name = "Clark", Age = 18 }
//            };//            Console.WriteLine("Students: " + string.Join(", ", studentList.Select(s => $"Name：{s.Name}, Age：{s.Age}")));//            Console.WriteLine("=================================================================================");//            // 创建数字列表
//            List<int> numberList = new List<int> { 1, 2, 3, 4, 5 };//            // 在数字列表末尾加入 6
//            numberList.Add(6);//            // 在数字列表末尾加入 7、8、9
//            numberList.AddRange(new List<int> { 7, 8, 9 });//            Console.WriteLine("now_List: " + string.Join(" ", numberList));//            // 获取数字列表中的所有偶数
//            List<int> evenNumbers = numberList.FindAll(n => n % 2 == 0);
//            Console.WriteLine("获取的偶数有: " + string.Join(" ", evenNumbers));//            // 删除数字列表中的 9
//            numberList.Remove(9);
//            Console.WriteLine("now_List: " + string.Join(" ", numberList));//            // 删除数字列表中索引为 0 的元素
//            numberList.RemoveAt(0);
//            Console.WriteLine("now_List: " + string.Join(" ", numberList));//            // 打印第一个
//            Console.WriteLine("First_number:" + numberList.First());//            Console.WriteLine("=================================================================================");//            // 水果列表
//            List<string> fruitList = new List<string> { "apple", "banana", "cherry" };//            // 在索引为 1 的位置插入 orange
//            fruitList.Insert(1, "orange");
//            Console.WriteLine("now_Fruit: " + string.Join(" ", fruitList));//            // 复制水果列表从索引 0 开始的两个元素到 myFruit 数组中，并从数组的索引 0 开始存入
//            string[] myFruit = new string[2];
//            fruitList.CopyTo(0, myFruit, 0, 2);
//            Console.WriteLine("myFruit: " + string.Join(" ", myFruit));//            // 复制水果列表从索引 1 开始的三个元素到 subList 中
//            List<string> subList = fruitList.GetRange(1, 3);
//            Console.WriteLine("subList: " + string.Join(" ", subList));//            // 翻转水果列表元素排序顺序
//            fruitList.Reverse();
//            Console.WriteLine("now_Fruit: " + string.Join(" ", fruitList));//            // 对水果列表元素进行排序
//            fruitList.Sort();
//            Console.WriteLine("now_Fruit: " + string.Join(" ", fruitList));//            // 清空水果列表
//            fruitList.Clear();
//            Console.WriteLine("now_Fruit: " + string.Join(" ", fruitList));//            Console.ReadLine();
//        }
//    }
//}    /*冗长的foreach
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace List_T
{class Student{public string Name { get; set; }public int Age { get; set; }}internal class Program{static void Main(string[] args){List<Student> studentList = new List<Student>{new Student { Name = "Alice", Age = 20 },new Student { Name = "Ben", Age = 18 },new Student { Name = "Clark", Age = 18 }};foreach (Student student in studentList){Console.Write("Name：" + student.Name);Console.WriteLine(",  Age：" + student.Age);}Console.WriteLine("=================================================================================");// 创建数字列表List<int> numberList = new List<int> { 1, 2, 3, 4, 5 };// 在数字列表末尾加入 6numberList.Add(6);// 在数字列表末尾加入 7、8、9numberList.AddRange(new List<int> { 7, 8, 9 });Console.Write("now_List:");foreach (int number in numberList){Console.Write(" " + number);}Console.WriteLine();// 获取数字列表中的所有偶数List<int> evenNumbers = numberList.FindAll(n => n % 2 == 0);Console.Write("获取的偶数有:");foreach (int number in evenNumbers){Console.Write(" " + number);}Console.WriteLine();// 删除数字列表中的 9numberList.Remove(9);Console.Write("now_List:");foreach (int number in numberList){Console.Write(" " + number);}Console.WriteLine();// 删除数字列表中索引为 0 的元素numberList.RemoveAt(0);Console.Write("now_List:");foreach (int number in numberList){Console.Write(" " + number);}Console.WriteLine();//打印第一个Console.WriteLine("First_number:" + numberList.First());Console.WriteLine("=================================================================================");// 水果列表List<string> fruitList = new List<string> { "apple", "banana", "cherry" };// 在索引为 1 的位置插入 orangefruitList.Insert(1, "orange");Console.Write("now_Fruit:");foreach (string number in fruitList){Console.Write(" " + number);}Console.WriteLine();// 复制水果列表从索引 0 开始的两个元素到 myFruit 数组中，并从数组的索引 0 开始存入string[] myFruit = new string[2];fruitList.CopyTo(0, myFruit, 0, 2);Console.Write("myFruit:");foreach (string number in myFruit){Console.Write(" " + number);}Console.WriteLine();// 复制水果列表从索引 1 开始的三个元素到 subList 中List<string> subList = fruitList.GetRange(1, 3);Console.Write("subList:");foreach (string number in subList){Console.Write(" " + number);}Console.WriteLine();// 翻转水果列表元素排序顺序fruitList.Reverse();Console.Write("now_Fruit:");foreach (string number in fruitList){Console.Write(" " + number);}Console.WriteLine();// 对水果列表元素进行排序fruitList.Sort();Console.Write("now_Fruit:");foreach (string number in fruitList){Console.Write(" " + number);}Console.WriteLine();// 清空水果列表fruitList.Clear();Console.Write("now_Fruit:");foreach (string number in fruitList){Console.Write(" " + number);}Console.WriteLine();Console.ReadLine();}}
}*/