How to perform input and output operations in C#?

In C#, you can use the Console class for input and output operations. Here are some commonly used input and output methods:

1. Receive user input:

Console.WriteLine("请输入一个字符串：");
string input = Console.ReadLine();
Console.WriteLine("您输入的字符串是：" + input);

1. Print information to the console.

Console.WriteLine("Hello, World!");

1. Format output:

int num = 10;
Console.WriteLine("数字{0}的平方是{1}", num, num*num);

1. Prompt the user to enter an integer.

Console.WriteLine("请输入一个整数：");
int num = int.Parse(Console.ReadLine());
Console.WriteLine("您输入的整数是：" + num);

It is important to note that when taking user input, data type conversion should be performed to ensure that the input data type matches the expected type, in order to avoid exceptions.