C# Backend Development

What is .NET and C#

.NET ecosystem: .NET Core, .NET Framework, .NET Standard

CLR, CTS, and CLS

Setting up Visual Studio / VS Code

First C# Console App

Project Structure and Compilation Process

Understanding .csproj files

Variables and Data Types

Operators and Expressions

Control Structures (if, switch, loops)

Methods and Parameters

Strings and String Manipulation

Arrays and Collections (List, Dictionary, HashSet)

Nullable Types

Enums and Constants

Asynchronous Programming

Classes and Objects

Properties and Fields

Constructors

Inheritance and Polymorphism

Abstract Classes and Interfaces

Access Modifiers

Static Classes and Members

Introduction to Dependency Injection

Understanding this, base, and override

Composition vs Inheritance

SOLID, DRY, KISS principles

Common patterns: Singleton, Repository, Dependency Injection, Factory

Separation of Concerns, Layered Architecture

Exception Handling (try-catch-finally, custom exceptions)

Working with Files and Streams

Simple I/O operations

Using using statement and IDisposable

Introduction to LINQ

Nullable types and Null-coalescing operator

ASP.NET Core Overview

Understanding MVC vs API project templates

Creating a simple Web API with GET/POST

Controllers and Routing Basics

Model Binding & Basic Validation

Returning JSON responses

Authentication and Authorization

Introduction to EF Core

Creating Models

Creating and Applying Migrations

Basic CRUD operations with EF Core

Using DbContext

Code First vs DB First Approach

Simple LINQ queries with EF

Introduction to Git

Local & Remote Repositories

Git clone, commit, push, pull, merge

Branching basics

Debugging in Visual Studio

NuGet Package Manager

Introduction to NUnit

Introduction to NUnit

Writing Basic Unit Tests

Assertions

Understanding test project setup

Testing simple business logic

Basics of mocking

Build a Web API Project

Use EF Core for data persistence

Apply CRUD operations

Basic validation and error handling

Use Git for versioning

Present project for review