c# list<T>操作实例

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;  namespace ConsoleApplication6 {     class Program     {         static void Main(string[] args)         {              List<string[]> str1 = new List<string[]> { };              List<string[]> str2 = new List<string[]> { };              string[] class1 = { "牛连山", "数学成绩", "58" };              string[] class2 = { "孙少华", "数学成绩", "37" };              string[] class3 = { "蒋大帅", "数学成绩", "45" };              string[] class4 = new string[20];              //str1.AddRange(str2);              str1.Add(class1);              str1.Add(class2);              str1.Add(class3);              Console.WriteLine("输出1:"+str1.Count());//结果是3              Console.WriteLine("输出2:"+str1[0][0]);              Console.WriteLine("输出3:"+(str1.OrderBy(s => s[2]).ToList())[2][2]);                      List<string> lists = new List<string> { };             lists.Add("str");             lists.Add("hello");             string[] str = lists.ToArray();             foreach(string aa in str)             {                 Console.WriteLine(aa);             }              List<byte[]> byt1 = new List<byte[]> { };             List<byte[]> byt2 = new List<byte[]> { };             List<byte> byt3 = new List<byte> { };             byte[] by1 = { 0x11, 0x03, 0x05 ,0x24};             byte[] by2 = { 0xA9, 0x01, 0x56 };             byte[] by3 = { 0x04, 0x02, 0x07 };             byte[,] by4 = new byte[9,2];             byte[] by5 = new byte[9];             byte zijie;             byt1.Add(by1);             byt1.Add(by2);             byt1.Add(by3);             byt2.Add(by1);              Console.WriteLine("输出4:" + byt1.Count());             byt2 = byt1.OrderBy(s => s[1]).ToList();             Console.WriteLine("输出字节：{0}-{1}-{2}", byt2[0][0],byt2[0][1],byt2[0][2]);             zijie = byt2[0][0];             Console.WriteLine("输出5:" + zijie);             by4[0,1] = 0x11;             Console.WriteLine(by4[0, 1].ToString());             Console.WriteLine(byt2.ToArray()[0][0].ToString());             foreach(byte[] item in byt2)             {               var  listdata = item.ToList();                    foreach(var item1 in item)                     Console.Write("--"+item1.ToString());                 Console.Write("--"+listdata.Count().ToString());             }                               Console.ReadKey();          }     } }