---
title: "What is .NET Core?"  
description: "What is .NET Core?"  
author: "Ravi Vishwakarma"  
published: 2026-03-15  
updated: 2026-04-22  
canonical: https://answers.mindstick.com/qa/116413/what-is-dot-net-core  
category: "asp.net"  
tags: ["asp.net", ".net programming"]  
reading_time: 2 minutes  

---

# What is .NET Core?

## Answers

### Answer by Anubhav Sharma

**.NET Core** is a **cross-platform, open-source framework** developed by Microsoft for building [modern applications](https://answers.mindstick.com/blog/29/api-gateway-a-complete-guide-for-modern-applications) like web apps, APIs, microservices, [cloud](https://www.mindstick.com/services/cloud-development) apps, and even desktop software.

## Simple Explanation

Think of .NET Core as a **toolkit + runtime** that lets you write code (usually in C#) and run it on:

- Windows
- Linux
- macOS

Earlier, the old **.NET Framework** was mostly limited to Windows. .NET Core removed that limitation.

## Key Features

### 1. Cross-Platform

- Write once, run anywhere (Windows, Linux, macOS).

### 2. High Performance

- Faster than the older .NET Framework, optimized for modern apps and cloud.

### 3. Open Source

- Source code is publicly available and maintained on GitHub.

### 4. Built for Cloud & Microservices

- Works well with containers like Docker and [cloud platforms](https://www.mindstick.com/forum/158616/discuss-the-integration-of-dot-net-core-with-cloud-platforms-such-as-azure) like Azure.

### 5. Built-in Dependency Injection

- DI is integrated by default (unlike older .NET Framework).

## Main Components

- **CLR ([Common Language Runtime](https://www.mindstick.com/articles/16/common-language-runtime))** → Executes your code
- **Base Class Libraries** → Pre-built functions (collections, IO, etc.)
- **[ASP.NET Core](https://www.mindstick.com/articles/12946/get-started-with-asp-dot-net-core-mvc-and-visual-studio)** → For building web apps & APIs
- **[Entity Framework](https://www.mindstick.com/articles/12153/how-to-access-data-in-mvc-using-entity-framework) Core** → ORM for [database access](https://www.mindstick.com/forum/158852/what-are-the-main-components-of-the-entity-framework-core-and-how-are-they-used-for-database-access)

## .NET Core vs .NET Framework

| Feature | .NET Core | .NET Framework |
| --- | --- | --- |
| Platform | Cross-platform | Windows only |
| Performance | High | Moderate |
| Open Source | Yes | Limited |
| Cloud Ready | Yes | Not optimized |

## Example Use

You can build:

- Web APIs (REST services)
- MVC [web applications](https://answers.mindstick.com/qa/111785/how-do-i-implement-authentication-and-authorization-in-web-applications)
- Real-time apps (SignalR)
- Microservices
- [Background jobs](https://www.mindstick.com/forum/162019/how-to-implement-background-jobs-in-asp-dot-net)

## Note (Important)

Today, **.NET Core has evolved into just “.NET” (starting from .NET 5 and later)**.

So:

- .NET Core 3.1 → Old naming
- .NET 6, 7, 8 → Modern unified platform

> ## In One Line
>
> *.NET Core is a fast, modern, cross-platform framework for building scalable applications using C#.*


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Original Source: https://answers.mindstick.com/qa/116413/what-is-dot-net-core

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