Project Structure of an MVC App

When you create a new ASP.NET Core MVC application, the project contains multiple folders and files that work together to build a complete web application.

Understanding the project structure of an MVC application is important because each folder has a specific purpose. These folders help organize controllers, views, models, static files, and configuration settings.

A well-structured MVC project makes the application easier to maintain, easier to scale, and easier for teams to collaborate on.

What Does the MVC Project Structure Look Like?

A typical ASP.NET Core MVC application contains the following folders:

  • Controllers
  • Models
  • Views
  • wwwroot
  • Properties

It also includes important configuration files such as:

  • Program.cs
  • appsettings.json
  • .csproj file
ASP.NET Core MVC Project Structure

Each part of the project plays a specific role in the application architecture.

Typical ASP.NET Core MVC Project Structure

A newly created MVC project usually contains the following structure:


Project
│
├── Properties
│   └── launchSettings.json
│
├── wwwroot
│   ├── css
│   ├── js
│   └── lib
│
├── Controllers
│   └── HomeController.cs
│
├── Models
│   └── ErrorViewModel.cs
│
├── Views
│   ├── Home
│   │   ├── Index.cshtml
│   │   └── Privacy.cshtml
│   │
│   ├── Shared
│   │   ├── _Layout.cshtml
│   │   ├── _ValidationScriptsPartial.cshtml
│   │   └── Error.cshtml
│   │
│   ├── _ViewImports.cshtml
│   └── _ViewStart.cshtml
│
├── appsettings.json
└── Program.cs

Each folder in this structure serves a specific purpose within the MVC architecture.

What Is the Properties Folder?

The Properties folder contains configuration files related to how the application runs during development.

The most important file inside this folder is launchSettings.json.

This file defines settings such as:

  • The application URL used during development
  • The environment configuration (Development, Production, etc.)
  • Launch profiles used by Visual Studio

Developers typically do not modify this file frequently unless they want to change the development server configuration.

What Is the wwwroot Folder?

The wwwroot folder contains all the static files that can be directly accessed by the browser.

These files are not processed by MVC controllers. Instead, they are served directly by the web server.

The folder commonly contains:

  • css – stylesheets used by the application
  • js – JavaScript files
  • lib – client-side libraries such as Bootstrap or jQuery

Any file placed inside the wwwroot folder becomes publicly accessible to users visiting the website.

What Is the Controllers Folder?

The Controllers folder contains classes responsible for handling incoming HTTP requests.

Controllers receive requests from the browser, process the request, and return an appropriate response such as a view.

A typical MVC template includes a controller called HomeController.

Example:


public class HomeController : Controller
{
    public IActionResult Index()
    {
        return View();
    }
}

Controllers act as the central coordination point in the MVC architecture.

What Is the Models Folder?

The Models folder contains classes that represent application data.

These classes are used to transfer data between controllers and views.

In the default MVC template, you will find a model named ErrorViewModel.cs.

Example model:


public class ErrorViewModel
{
    string RequestId { get; set; }
}

As applications grow, developers typically create additional models representing entities such as products, users, or orders.

What Is the Views Folder?

The Views folder contains Razor view files that generate the HTML user interface.

Views are responsible for presenting data to users.

Inside the Views folder, files are usually organized based on controller names.

Home Folder

The Home folder contains views associated with the HomeController.

By default, it contains two pages:

  • Index.cshtml – the application's main homepage
  • Privacy.cshtml – a sample privacy policy page

When a controller returns View(), MVC automatically looks for the corresponding view file in this folder.

Shared Folder

The Shared folder contains views that are reused across multiple pages.

This folder usually contains:

  • _Layout.cshtml
  • _ValidationScriptsPartial.cshtml
  • Error.cshtml

The _Layout.cshtml file defines the common layout structure of the website such as the header, navigation bar, and footer.

The _ValidationScriptsPartial.cshtml file includes JavaScript code required for client-side form validation.

The Error.cshtml view displays error information when an exception occurs.

What Are _ViewImports and _ViewStart Files?

The Views folder also contains two important configuration files:

  • _ViewImports.cshtml
  • _ViewStart.cshtml

_ViewImports.cshtml is used to include namespaces, tag helpers, and directives that should be available in all views.

_ViewStart.cshtml defines common settings applied to views, such as specifying the layout page used by the application.

What Is appsettings.json?

The appsettings.json file stores configuration settings used by the application.

This file often contains:

  • Database connection strings
  • Logging settings
  • Application configuration values

Using configuration files allows developers to change settings without modifying application code.

What Is Program.cs?

The Program.cs file is the entry point of an ASP.NET Core application.

This file configures the services and middleware required to run the application.

Example:


var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllersWithViews();

var app = builder.Build();

app.UseRouting();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}"
);

app.Run();

This configuration enables MVC routing and starts the application.

Why Is the MVC Project Structure Important?

The MVC project structure provides a clear separation of responsibilities.

Benefits include:

  • Better code organization
  • Easier debugging
  • Improved scalability
  • Clear separation between UI and business logic

This organized structure allows developers to maintain large applications efficiently.

Summary

The default ASP.NET Core MVC project structure organizes the application into logical folders such as Controllers, Models, Views, and wwwroot.

Each folder has a specific role in the MVC architecture, ensuring that application logic, user interface, and configuration settings remain properly separated.

Understanding this structure helps developers quickly navigate and extend MVC applications as they grow.