C# 程序的结构

一个简单的 C# 语句

1Console.WriteLine("This is a statement.");

定义代码块

1{
2    Console.WriteLine("I am inside a block!");
3    Console.WriteLine("Me too.");
4}

1using System;
2
3class FirstProgram
4{
5    static void Main()
6    {
7        Console.WriteLine("Hello, World!");
8        
9        {
10            Console.WriteLine("Code inside a block");
11            {
12                // Nested block
13                Console.WriteLine("Code inside an enclosed block");
14            }
15        }
16    }
17}

1using System;
2
3class FirstProgram
4{
5    static void Hello()
6    {
7        Console.WriteLine("An executable .NET app cannot be compiled without the Main method");
8    }
9}

代码示例

1error CS5001: Program does not contain a static 'Main' method suitable for an entry point

1using System;
2
3/*
4    A program that prints to the console.
5*/
6class Program
7{
8    // The Main method (the entry point)
9    static void Main()
10    {
11        Console.WriteLine("I am 'Program' class");
12    }
13}

1Console.WriteLine("I am a top-level program");