tujiaming

using System.Collections; // See https://aka.ms/new-console-template for more information Console.Wr

// See https://aka.ms/new-console-template for more information using System.Security.Cryptography.X

// See https://aka.ms/new-console-template for more information Console.WriteLine("Hello, World!");

/* 如果一个字符a串和一个数字拼接， 会将数字转换成字符串再拼接；如下 */ //隐式类型转换 偷偷帮你转换 Console.WriteLine("a"+3); //强制类型转换 Convert.T

// See https://aka.ms/new-console-template for more information Console.WriteLine("Hello, World!");

using System; using System.Diagnostics; namespace ConsoleApp3 { class Program { static void Main(str