Tutorial: Programming Fundamentals with C# and .NET Chapter 1: Orientation & Setup Chapter 2: C# Basics – Variables, Data Types, Operators, Control Flow, and I/O Chapter 3: Methods & Functions – Parameters, Return Types, and Scope Chapter 4: Object-Oriented Programming – Classes, Objects, and Encapsulation Chapter 5: SOLID Principles – Writing Maintainable and Scalable Code Chapter 6: Object-Oriented Programming – Inheritance and Polymorphism Chapter 7: Data Structures Basics – Arrays, Lists, Dictionaries, Stacks, and Queues Chapter 8: LINQ Deep Dive – Querying and Transforming Data Chapter 9: Async and Multithreading – Task-based Programming and Parallelism Chapter 10: Mini Project – Console-based Expense Tracker

Tutorial: Programming Fundamentals with C# and .NET

Welcome to this hands-on tutorial where we will build a strong foundation in Programming Fundamentals using C# and .NET.

In this journey, you will learn how to write clean, efficient, and scalable code that forms the backbone of enterprise applications.

We will use modern tools and best practices including Visual Studio / VS Code, .NET SDK, and GitHub integration.

Let’s get started.

About this tutorial

The primary goal of this tutorial is to help you learn by coding real-world examples rather than just understanding concepts theoretically.

Using the GitHub repository:
👉 https://github.com/irshadazmi/DotNetFundamentals (github.com in Bing)

we will progressively build and enhance small console-based applications, covering both core programming concepts and integration with modern .NET features.

What you will learn

This tutorial is carefully designed to take you from basic programming constructs to advanced fundamentals. You will learn:

🚀 Project Setup & Fundamentals

  • Install and configure .NET SDK
  • Create your first C# console application
  • Understand project structure and compilation

📐 Core Programming Concepts

  • Variables, data types, and operators
  • Control flow (if, switch, loops)
  • Methods, parameters, and return types

🧩 Object-Oriented Programming

  • Classes and objects
  • Constructors and properties
  • Inheritance, polymorphism, and interfaces

📏 SOLID Principles

  • Learn the 5 SOLID principles
  • Apply them in small coding exercises
  • Understand why they matter in enterprise systems

📊 Data Structures Basics

  • Arrays, Lists, Dictionaries
  • Stacks and Queues
  • Practical coding exercises

🔎 LINQ Deep Dive

  • LINQ syntax and query operators
  • Filtering, projection, grouping
  • LINQ to Objects vs LINQ to SQL

⚡ Async & Multithreading

  • Task-based async programming
  • async/await keywords
  • Parallel programming patterns

Learning approach

This tutorial follows a practical, step-by-step approach:

  • Each chapter focuses on a specific concept
  • Code is explained with minimal theory and maximum clarity
  • You can:
    • Build from scratch 🛠️
    • Or use the GitHub repo as a reference

We strongly follow the principle of:

👉 Learning by doing

What we are building

We will build a series of mini console applications to reinforce learning, including:

  • Calculator app
  • Expense Tracker (console-based)
  • LINQ-driven data analyzer
  • Async file processor

These projects are designed to reflect real-world coding practices and prepare you for advanced .NET development.

Prerequisites

Before starting, you should have:

  • Basic knowledge of programming (any language)
  • Visual Studio or VS Code installed
  • .NET SDK installed on your system
  • GitHub account for version control

How to use this tutorial

  • Follow chapters sequentially for best results
  • Each chapter builds on the previous one
  • Important code snippets will be highlighted and explained
  • You can experiment and extend features as you go
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