C# Lesson 1: Create a C# project

1. New project

sln: solution

csproj ： C shap peoject

cs：class

The solution contains projects, and projects contain classes.

Method is also called function

2. Program composition

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//using xxxx  命名空间

namespace lesson01  //项目名称
{
    class Program   //类
    {
        static void Main(string[] args)     //main函数又叫main方法，程序的主入口，起始于main，结束于main
        {
        }
    }
}

Three, the project

3.1 Set startup items

Method 1: Change in solution properties

Method 2: Right-click the project

3.2 Deleting and uninstalling the project

Four, C# comments

4.1 Line comments (//double slash)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//using xxxx  命名空间
//使用using语句导入命名空间时需要将其放在程序的开头。

4.2 Multi-line comments (/* */)

/*
 * 第一个程序
 * 注释下
 */

namespace lesson01  //项目名称
{
    class Program   //类
    {
        static void Main(string[] args)     //main函数又叫main方法，程序的主入口，起始于main，结束于main
        {
            Console.WriteLine("第一个C#程序");
            Console.ReadKey();
        }
    }
}

4.3 Document comments (///)

namespace lesson01  //项目名称
{
    class Program   //类
    {
        /// <summary>
        /// 随便注释下
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)     //main函数又叫main方法，程序的主入口，起始于main，结束于main
        {
            Console.WriteLine("第一个C#程序");
            Console.ReadKey();
        }
    }
}

Dedicated to explaining classes or methods

Five, VS shortcut keys

5.1 Quick alignment

CTRL+K, only release K, quickly press D

5.2 Quick Smart Tips

Ctrl+J

5.3 Row operations

ctrl+home: start of line

ctrl+end: line tail

shift+home: After the cursor is at the end of the line, press the shortcut key to select the entire line

5.4 Uncomment

5.5 Code folding

# region

#endregion

namespace lesson01  //项目名称
{
    class Program   //类
    {
        /// <summary>
        /// 随便注释下
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)     //main函数又叫main方法，程序的主入口，起始于main，结束于main
        {
 
            Console.WriteLine("第一个C#程序");
            Console.WriteLine("第一个C#程序");
            #region
            Console.WriteLine("第一个C#程序");
            Console.WriteLine("第一个C#程序");
            #endregion
            Console.ReadKey();

        }
    }
}

5.6 Other

Save: ctrl + S

Cancel: ctrl + Z