.NET Tutorial

1. .NET Introduction

What .NET is, the CLR, JIT and BCL, plus the difference between .NET Framework, .NET Core and modern .NET.

2. C# & .NET Project Basics

Project structure, the .csproj file, NuGet packages, and how the C# language relates to the .NET platform.

3. Dependency Injection in .NET

The built-in DI container, constructor injection, and the real difference between Singleton, Scoped and Transient.

4. Testing with xUnit

A complete xUnit test class with [Fact] and [Theory], and mocking dependencies with Moq.

5. Performance & Memory Management

Value vs reference types for performance, Span<T> for allocation-free slicing, and GC generations conceptually.

6. .NET Interview Questions

Commonly asked .NET interview questions with clear, practical answers.