ASP.NET MVC vs ASP.NET Core MVC

Introduction

Many developers get confused because both frameworks follow the MVC (Model-View-Controller) pattern and their controller and view code looks similar. However, internally they are very different.

Let’s understand the differences in detail.

1️⃣ Platform Support

ASP.NET MVC

• Built on .NET Framework

• Works only on Windows

• Requires IIS (Internet Information Services)

• Cannot run natively on Linux or macOS

ASP.NET Core MVC

• Built on modern .NET (Core/5/6/7/8)

• Cross-platform

• Runs on Windows, Linux, and macOS

• Can run inside Docker containers

2️⃣ Performance

ASP.NET MVC

• Uses System.Web

• Heavy request pipeline

• Slower compared to ASP.NET Core

ASP.NET Core MVC

• Lightweight architecture

• No System.Web dependency

• Faster request processing

• High performance for APIs and microservices

3️⃣ Project Structure Difference

ASP.NET MVC Structure

• web.config

• Global.asax

• App_Start folder

• System.Web dependency

ASP.NET Core MVC Structure

• appsettings.json

• Program.cs

• Startup logic (inside Program.cs in .NET 6+)

• No Global.asax

• Built-in dependency injection

ASP.NET Core MVC projects look cleaner and more modern.

4️⃣ Configuration System

ASP.NET MVC

Configuration is stored in:

web.config

XML-based configuration.

ASP.NET Core MVC

Configuration is stored in:

appsettings.json

JSON-based configuration (easier to read and manage).

5️⃣ Middleware vs HTTP Modules

ASP.NET MVC

Uses:

• HTTP Modules

• HTTP Handlers

The pipeline is more complex.

ASP.NET Core MVC

Uses:

• Middleware

Example:

app.UseAuthentication();
app.UseAuthorization();

Middleware is simpler and more powerful.

6️⃣ Simple Code Comparison

ASP.NET MVC Controller

public ActionResult Index()
{
    ViewBag.Message = "Hello from MVC";
    return View();
}

ASP.NET Core MVC Controller

public IActionResult Index()
{
    ViewData["Message"] = "Hello from Core MVC";
    return View();
}

Code may look similar, but the underlying architecture is completely different.