[C#教学备案]切片及字符串拼接等

代码参考:

using System;
using System.Linq;

namespace SliceDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            var myArray = new string[] { "10", "20", "30", "40", "50", "60", "70", "80", "90", "100" };

            foreach (var e in myArray[0..5])
            {
                Console.WriteLine(e);
            }
          
            Console.WriteLine("--------------------");
            foreach (var e in myArray[^3..^1])
            {
                Console.WriteLine(e);
            }
            Console.WriteLine("--------------------");
            var q1 = myArray.Skip(2).Take(3);
            foreach (var e in q1)
            {
                if (e == "40")
                    break;
                Console.WriteLine(e);
            }
            
            Console.WriteLine("--------------------");
            foreach (var e in q1)
            {
                Console.WriteLine(e);
            }
            Console.WriteLine($"q1={string.Join(',', q1)}");
            Console.WriteLine("--------------------");
            var q2 = myArray[2..5];
            foreach (var e in q2)
            {
                Console.WriteLine(e);
            }
            Console.WriteLine($"q2={string.Join(',',q2)}");
            Console.WriteLine("--------------------");
            var name = "张三";
            var age = 23;
            var sex = "男";
            var show = string.Format($"测试字符串拼接:我是{name},今年{age},家住在{{0}}", sex);
            Console.WriteLine(show);

        }
    }
}