App_Start

It has configuration classes to reduce clutter code in the Global.asax

它包含了配置类来减少在Global.asax中的杂乱代码

Application_Start 方法

App_Start 文件夹里有如下文件:

AuthConfig.cs: Related to security settings, including sites for OAuth login.

关于安全设置，包含网站的授权登录。

BundleConfig.cs: Related to register bundles for the bundling and minification

有关用于捆绑和微小的注册捆

FilterConfig.cs: To register global MVC filters.(by default HandleErrorAttribute is registered)

用来注册全局MVC过滤。(默认HandleErrorAttribute是已注册的)

RouteConfig.cs: Related to MVC Route configuration

有关MVC路由的配置

WebApiConfig.cs: Used to register Web API routes and configuration settings.
用于注册Web API路由和配置设置。

Also, this folder helps to use nuget packages that use Application_Start code, without touching Global.asax.cs.
同样，这个文件夹帮助NuGet包使用Application_Start代码儿不接触Global.asax.cs。

Areas

An MVC structure inside the application to partition our web application into smaller parts.

一个MVC架构在应用程序分割我们的web应用成较小的部分。

Content

To put CSS and other static contents

存放CSS和其他静态目录

Controllers

Contains the controller classes

包含控制类

Images

For images, It is being referenced from the Content\Site.css by default.

针对Imanges文件夹，它默认被从Content\SIte.css引用。

Models

Contains view model and domain model classes.

包含视图模型和域模型类

Scripts

Stores all JavaScript libraries and files

存储所有的Javascript库和文件

Views

Related to the display of the application (UI).

关于应用程序界面的显示

/Views/Shared

This directory holds layouts (master-page in-terms of web forms) and views which is used to store views shared between controllers 

这个目录掌握着布局（web表单的主页）和被用于在控制类之间存储视图共享的视图

/Views/[FolderName]

Views or Partial Views specific to that folder or single controller like Account folder is specific to Account controller for registering and logging in to user accounts.

视图或者Partial视图针对文件夹或者单个控制，像Account文件夹是针对Account控制类用来注册和打印用户账号的日志。