static void Main(string[] args)

        {

        //这样就很方便写读取的文件路径，也不需要什么转义字符了

             StreamReader sr = new StreamReader(@"C:\Users\WANGWI8\Desktop\testStreamRead.txt");

             string line;

             while( (line = sr.ReadLine()) != null )

             {

                 Console.WriteLine(line);

             }

         }

  static void Main(string[] args)

        {

            var name = Console.ReadLine();

            var date = DateTime.Now;

            var result = $"hello {name} , you are my father , i am your son , writed at {date}";

            Console.WriteLine(result);

            var item2 =

            (

                name: "william",

                sex: 'f'

            );

            Console.WriteLine($"this is item : item.name : {item2.name} , this is sex : {item2.sex}");

            var inventory = new Dictionary<string, int>()

            {

                ["hammer, ball pein"] = 18,

                ["hammer, cross pein"] = 5,

                ["screwdriver, Phillips #2"] = 14

            };

            Console.WriteLine($"inventory on {DateTime.Now:d}");

            Console.WriteLine(" ");

            //负号的意思是左对齐，一共占据25个字符的空间

            Console.WriteLine($"|{"item",-25}|{"quantity",10}|");

            foreach (var item in inventory)

                Console.WriteLine($"|{item.Key,-25}|{item.Value,10}|");

        }