Course Overview & Running Example

What this C# course covers, how to use it, prerequisites, and the running example used throughout.

Track: Computer Science → Programming Languages → C# Platform:.NET (examples verified with.NET SDK 10.0.401 / runtime 10.0.12, C# 14)

Levels: Beginner → Intermediate → Advanced → Expert / Professional

Audience: Students, beginners, application and web developers, test and automation engineers, embedded/automotive tool developers, and interview candidates

Course Overview

C# is a strongly typed, object-oriented, multi-paradigm programming language created by Microsoft. It runs on .NET, a free, open-source, cross-platform runtime and library ecosystem. C# is used for:

Desktop applications (WinForms, WPF,.NET MAUI) Web applications and APIs (ASP.NET Core) Cloud services and microservices Game development (Unity) Mobile applications (.NET MAUI)

Embedded, IoT, test automation and engineering tools Automation, scripting and data processing

This course takes you from your first line of C# to advanced language features, the runtime, concurrency, architecture, performance and production engineering. It follows the EngiLipi C# syllabus chapter by chapter; every chapter of the syllabus is covered by a module below.

How This Course Is Organized Every module follows the same structure:

The explanation, split into sub-topics Why It Matters Where the topic shows up in real software The general form of the feature

The real output of the example programs Pitfalls, often with the real compiler error How professionals use the feature What interviewers ask about it Exercises to try yourself

Multiple-choice, true/false, predict-the-output and find-the-bug questions with answers A small problem with a worked solution A Note on Verified Output

Every program in this course was compiled and run with the .NET 10 SDK (10.0.401) on Windows x64, and the output shown under Expected Result is exactly what it printed. Compiler errors shown under Common Mistakes are the real diagnostics from the C# compiler. Most programs are written as file-based apps: save the code as Program.cs (or any name) and run it with dotnet run Program.cs (.NET 10+), or paste it into the Program.cs of a console project created with dotnet new console. Output involving timing, memory addresses or the current date can differ on your machine; such lines are pointed out where they occur.

Learning Objectives

By the end of this course you will be able to:

Explain how C# source becomes IL, assemblies and native code on the .NET runtime.

Set up the .NET SDK and use the dotnet CLI to create, build, run, test and publish projects.

Use C#'s type system: value and reference types, conversions, nullability, generics.

Write clear control flow, methods, strings, arrays and collection code.

Design object-oriented programs with classes, interfaces, records, structs and enums.

Use delegates, lambdas, events, pattern matching and LINQ fluently.

Handle errors with exceptions and manage resources and memory correctly.

Work with files, streams, JSON, XML, dates, cultures and networking.

Write correct asynchronous, multithreaded and parallel code.

Use reflection, attributes, expression trees, source generators and Span<T>.

Build applications with dependency injection, configuration, logging and testing.

Access databases with ADO.NET and Entity Framework Core, and build ASP.NET Core APIs.

Apply security, design patterns, SOLID, clean architecture, DDD and CQRS.

Measure and improve performance, add resilience and observability, and ship with CI/CD and containers.

Build engineering and automotive tools (CAN, UDS, serial, test automation) in C#.

Answer C# interview questions and solve C# coding problems confidently.

Prerequisites

Basic computer literacy (installing software, using a terminal).

No prior programming experience is required.

A computer running Windows, Linux or macOS with the .NET SDK installed (Module 2 shows how).

Recommended editors: Visual Studio, Visual Studio Code with the C# Dev Kit, or JetBrains Rider.

The Course Running Example

Many examples use a small engineering domain so that code reads like real software:

A car under test, identified by a VIN An electronic control unit inside the vehicle (engine, brakes, battery)

A message on the vehicle bus: identifier + up to 8 data bytes

A diagnostic trouble code such as P0A80 An automated check that passes or fails

flowchart LR
    T[C# test application] --> A[Communication API]
    A --> B[CAN / Ethernet / Serial]
    B --> E[(ECU)]