What is .NET?
Lesson 1: What is .NET?
In this lesson, you will learn what .NET is, why it exists, and how it helps developers build modern applications.
🌟 What is .NET?
.NET is a free, open-source, cross-platform development platform created by Microsoft. It enables you to build different types of applications, including:
- Web applications
- Desktop applications
- Mobile applications
- Cloud services
- Games
- Internet of Things (IoT) apps
🛠️ Core Components of .NET
- .NET Runtime: Executes your application code, manages memory, performs garbage collection, and enforces security.
- Base Class Library (BCL): A large collection of prebuilt APIs and classes for file operations, networking, data access, collections, and security.
- Languages: .NET supports C#, Visual Basic .NET (VB.NET), and F#.
- SDK: Tools, compilers, and libraries to create, build, and run .NET applications.
💡 Why Use .NET?
- Cross-Platform: Works on Windows, Linux, and macOS.
- Open Source: The source code is available on GitHub.
- High Performance: Fast execution and efficient memory management.
- Rich Ecosystem: Huge collection of libraries and tools.
- Modern Development: Supports Dependency Injection, asynchronous programming, and REST APIs.
- Active Community: Millions of developers contributing and supporting each other.
🧩 .NET Versions and Flavors
- .NET Framework: The original Windows-only version (for legacy apps).
- .NET Core: The modern, cross-platform version.
- .NET 5/6/7+: The unified platform combining the best of previous versions.
🧑💻 Example: Simple .NET Console Application (C#)
using System;
class Program
{
static void Main()
{
Console.WriteLine("Hello, .NET World!");
}
}
✅ This example prints a simple message to the console.
📝 Summary
.NET is a powerful, flexible, and modern platform for creating all kinds of applications. It provides:
- A runtime to execute code safely and efficiently.
- A huge library of reusable components.
- Support for multiple languages and operating systems.
- Tools for modern development practices.
✅ Next Lesson
Lesson 2: History and Evolution of .NET
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