.NET Application -- Helloworld (C#)

安装 .NET and create your first app.

下载.NET SDK(Software development installation package)

32位下载：https://download.visualstudio.microsoft.com/download/pr/d238bcf4-7362-4885-b371-e23a269a96bd/838e7e2d43528f9c79001f7737d38e7d/dotnet-sdk-6.0.302-win-x86.exe

64位下载：https://download.visualstudio.microsoft.com/download/pr/c246f2b8-da39-4b12-b87d-bf89b6b51298/2d43d4ded4b6a0c4d1a0b52f0b9a3b30/dotnet-sdk-6.0.302-win-x64.exe

ARM64下载：https://download.visualstudio.microsoft.com/download/pr/b1b1b47e-dae9-48e1-80f3-9ff920fa937f/9ca322594becea69bf4b9104fdce6154/dotnet-sdk-6.0.302-win-arm64.exe

打开Windows PowerShell,输入命令行dotnet. 

dotnet

运行结果如下： 

如果安装成功,You should see output similar to the above.

创建应用：

在命令提示符下,Run the following command to create the app：

dotnet new console -o MyApp -f net6.0

Then navigate to the new directory created by the previous command：

cd MyApp

What do these commands represent?

• dotnet new console The command will create a new console application for you.
• -o Parameters are created named  MyApp 的目录,Used to store apps and populate them with required files.
• -f The parameter indicates that you are creating .NET 6 应用程序.
• 命令 cd MyApp will change the current directory to the directory just created for the new app.

 

Windows PowerShell的代码如下：

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

Install the latest PowerShell for new features and improvements! https://aka.ms/PSWindows

PS C:\Users\a-xiaobodou\OneDrive - Microsoft\Projects\C#> dotnet new console -o MyApp -f net6.0

欢迎使用 .NET 6.0!
---------------------
SDK 版本: 6.0.302

遥测
---------
.NET 工具会收集用法数据,帮助我们改善你的体验.它由 Microsoft 收集并与社区共享.你可通过使用喜欢的 shell 将 DOTNET_CLI_TELEMETRY_OPTOUT 环境变量设置为 "1" 或 "true" 来选择退出遥测.

阅读有关 .NET CLI 工具遥测的更多信息: https://aka.ms/dotnet-cli-telemetry

----------------
已安装 ASP.NET Core HTTPS 开发证书.
若要信任该证书,请运行 "dotnet dev-certs https --trust" (仅限 Windows 和 macOS).
了解 HTTPS: https://aka.ms/dotnet-https
----------------
编写你的第一个应用: https://aka.ms/dotnet-hello-world
查找新增功能: https://aka.ms/dotnet-whats-new
浏览文档: https://aka.ms/dotnet-docs
在 GitHub 上报告问题和查找源: https://github.com/dotnet/core
使用 "dotnet --help" 查看可用命令或访问: https://aka.ms/dotnet-cli
--------------------------------------------------------------------------------------
已成功创建模板“控制台应用”.

正在处理创建后操作...
在 C:\Users\a-xiaobodou\OneDrive - Microsoft\Projects\C#\MyApp\MyApp.csproj 上运行 “dotnet restore”...
  正在确定要还原的项目…
  已还原 C:\Users\a-xiaobodou\OneDrive - Microsoft\Projects\C#\MyApp\MyApp.csproj (用时 122 ms).
已成功还原.


PS C:\Users\a-xiaobodou\OneDrive - Microsoft\Projects\C#> cd MyApp
PS C:\Users\a-xiaobodou\OneDrive - Microsoft\Projects\C#\MyApp> notepad
PS C:\Users\a-xiaobodou\OneDrive - Microsoft\Projects\C#\MyApp> notepad Program.cs
PS C:\Users\a-xiaobodou\OneDrive - Microsoft\Projects\C#\MyApp>

Program.cs的代码如下：

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

 运行应用：

在命令提示符下,运行以下命令：

dotnet run

 

 编辑代码:

 

 Program.cs的代码如下：

 

 

// See https://aka.ms/new-console-template for more information
Console.WriteLine("Hello, World!");
Console.WriteLine("The current time is "+DateTime.Now);

Congrats on building and running your first one .NET 应用!