Build practical programming and technology skills

C# Fundamentals

Build, organize, test, and debug C# applications using modern .NET types, classes, records, LINQ, files, asynchronous work, and automated tests.

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FoundationDifficulty

30 hoursEstimated time

8 modules32 lessons

5 guided labsKnowledge check

Plan your learning

Path Brief

Skills you will practice

Enterprise · Csharp Fundamentals
Enterprise · Dotnet And Csharp Project Setup
Enterprise · Values Types And Control Flow
Enterprise · Methods And Program Structure
Enterprise · Classes Records And Encapsulation
Enterprise · Collections Generics And Linq

Prerequisites

No prior experience is required; basic computer and file-management skills are helpful.

Tools

A current web browser
A code editor or terminal appropriate to the path
A safe local or virtual lab environment

Before you begin

What you need

No prior experience is required; basic computer and file-management skills are helpful.

Step-by-step curriculum

Learning modules

Complete lessons in order or open the module that matches your current goal. Your lesson progress is saved on this device.

01.NET and C# Project SetupBuild practical skill in .net and c# project setup and connect it to the outcomes of C# Fundamentals.4 lessons · 1 lab

Lesson 1

.NET and C# Project Setup: Core Concepts for C# Fundamentals

Understand the concepts, decisions, and vocabulary you need before applying .NET and C# Project Setup in C# Fundamentals.

25 min

Lesson 2

Set Up and Explore .NET and C# Project Setup in C# Fundamentals

Prepare the tools, data, project state, or test environment needed to explore .NET and C# Project Setup safely and repeatably.

25 min

Lesson 3

Build a Practical .NET and C# Project Setup Example in C# Fundamentals

Create a new project, add one source file and one dependency if appropriate, run it, and document the commands another learner needs.

30 min

Lesson 4

Debug Common .NET and C# Project Setup Problems in C# Fundamentals

Recognize common failure modes in .NET and C# Project Setup, use the relevant diagnostics, and verify the correction.

25 min

Guided lab · 55 min · Safe

Guided Lab: .NET and C# Project Setup in C# Fundamentals

C# Fundamentals — .NET and C# Project Setup lab: Create a new project, add one source file and one dependency if appropriate, run it, and document the commands another learner needs.

Not started

02Values, Types, and Control FlowBuild practical skill in values, types, and control flow and connect it to the outcomes of C# Fundamentals.4 lessons · 1 lab

Lesson 1

Values, Types, and Control Flow: Core Concepts for C# Fundamentals

Understand the concepts, decisions, and vocabulary you need before applying Values, Types, and Control Flow in C# Fundamentals.

25 min

Lesson 2

Set Up and Explore Values, Types, and Control Flow in C# Fundamentals

Prepare the tools, data, project state, or test environment needed to explore Values, Types, and Control Flow safely and repeatably.

25 min

Lesson 3

Build a Practical Values, Types, and Control Flow Example in C# Fundamentals

Represent a small order or profile using appropriate types, then validate or convert input from text.

30 min

Lesson 4

Debug Common Values, Types, and Control Flow Problems in C# Fundamentals

Recognize common failure modes in Values, Types, and Control Flow, use the relevant diagnostics, and verify the correction.

25 min

Guided lab · 55 min · Moderate

Guided Lab: Values, Types, and Control Flow in C# Fundamentals

C# Fundamentals — Values, Types, and Control Flow lab: Represent a small order or profile using appropriate types, then validate or convert input from text.

Not started

03Methods and Program StructureBuild practical skill in methods and program structure and connect it to the outcomes of C# Fundamentals.4 lessons · 1 lab

Lesson 1

Methods and Program Structure: Core Concepts for C# Fundamentals

Understand the concepts, decisions, and vocabulary you need before applying Methods and Program Structure in C# Fundamentals.

25 min

Lesson 2

Set Up and Explore Methods and Program Structure in C# Fundamentals

Prepare the tools, data, project state, or test environment needed to explore Methods and Program Structure safely and repeatably.

25 min

Lesson 3

Build a Practical Methods and Program Structure Example in C# Fundamentals

Extract repeated logic into a function, call it with several inputs, and test one boundary case.

30 min

Lesson 4

Debug Common Methods and Program Structure Problems in C# Fundamentals

Recognize common failure modes in Methods and Program Structure, use the relevant diagnostics, and verify the correction.

25 min

Guided lab · 55 min · Moderate

Guided Lab: Methods and Program Structure in C# Fundamentals

C# Fundamentals — Methods and Program Structure lab: Extract repeated logic into a function, call it with several inputs, and test one boundary case.

Not started

04Classes, Records, and EncapsulationBuild practical skill in classes, records, and encapsulation and connect it to the outcomes of C# Fundamentals.4 lessons · 1 lab

Lesson 1

Classes, Records, and Encapsulation: Core Concepts for C# Fundamentals

Understand the concepts, decisions, and vocabulary you need before applying Classes, Records, and Encapsulation in C# Fundamentals.

25 min

Lesson 2

Set Up and Explore Classes, Records, and Encapsulation in C# Fundamentals

Prepare the tools, data, project state, or test environment needed to explore Classes, Records, and Encapsulation safely and repeatably.

25 min

Lesson 3

Build a Practical Classes, Records, and Encapsulation Example in C# Fundamentals

Create a small domain type with validation, one behavior method, and a test that protects an invariant.

30 min

Lesson 4

Debug Common Classes, Records, and Encapsulation Problems in C# Fundamentals

Recognize common failure modes in Classes, Records, and Encapsulation, use the relevant diagnostics, and verify the correction.

25 min

Guided lab · 55 min · Moderate

Guided Lab: Classes, Records, and Encapsulation in C# Fundamentals

C# Fundamentals — Classes, Records, and Encapsulation lab: Create a small domain type with validation, one behavior method, and a test that protects an invariant.

Not started

05Collections, Generics, and LINQBuild practical skill in collections, generics, and linq and connect it to the outcomes of C# Fundamentals.4 lessons · 1 lab

Lesson 1

Collections, Generics, and LINQ: Core Concepts for C# Fundamentals

Understand the concepts, decisions, and vocabulary you need before applying Collections, Generics, and LINQ in C# Fundamentals.

25 min

Lesson 2

Set Up and Explore Collections, Generics, and LINQ in C# Fundamentals

Prepare the tools, data, project state, or test environment needed to explore Collections, Generics, and LINQ safely and repeatably.

25 min

Lesson 3

Build a Practical Collections, Generics, and LINQ Example in C# Fundamentals

Store a small dataset in an appropriate collection, update it, search it, and explain why the chosen structure fits.

30 min

Lesson 4

Debug Common Collections, Generics, and LINQ Problems in C# Fundamentals

Recognize common failure modes in Collections, Generics, and LINQ, use the relevant diagnostics, and verify the correction.

25 min

Guided lab · 55 min · Moderate

Guided Lab: Collections, Generics, and LINQ in C# Fundamentals

C# Fundamentals — Collections, Generics, and LINQ lab: Store a small dataset in an appropriate collection, update it, search it, and explain why the chosen structure fits.

Not started

06Exceptions, Files, and ResourcesBuild practical skill in exceptions, files, and resources and connect it to the outcomes of C# Fundamentals.4 lessons

Lesson 1

Exceptions, Files, and Resources: Core Concepts for C# Fundamentals

Understand the concepts, decisions, and vocabulary you need before applying Exceptions, Files, and Resources in C# Fundamentals.

25 min

Lesson 2

Set Up and Explore Exceptions, Files, and Resources in C# Fundamentals

Prepare the tools, data, project state, or test environment needed to explore Exceptions, Files, and Resources safely and repeatably.

25 min

Lesson 3

Build a Practical Exceptions, Files, and Resources Example in C# Fundamentals

Read a small text or JSON file, transform one value, write a new output file, and handle a missing input.

30 min

Lesson 4

Debug Common Exceptions, Files, and Resources Problems in C# Fundamentals

Recognize common failure modes in Exceptions, Files, and Resources, use the relevant diagnostics, and verify the correction.

25 min

07Interfaces, Delegates, and Asynchronous WorkBuild practical skill in interfaces, delegates, and asynchronous work and connect it to the outcomes of C# Fundamentals.4 lessons

Lesson 1

Interfaces, Delegates, and Asynchronous Work: Core Concepts for C# Fundamentals

Understand the concepts, decisions, and vocabulary you need before applying Interfaces, Delegates, and Asynchronous Work in C# Fundamentals.

25 min

Lesson 2

Set Up and Explore Interfaces, Delegates, and Asynchronous Work in C# Fundamentals

Prepare the tools, data, project state, or test environment needed to explore Interfaces, Delegates, and Asynchronous Work safely and repeatably.

25 min

Lesson 3

Build a Practical Interfaces, Delegates, and Asynchronous Work Example in C# Fundamentals

Request JSON from a test API, show a loading state, parse the result, and handle a failed request.

30 min

Lesson 4

Debug Common Interfaces, Delegates, and Asynchronous Work Problems in C# Fundamentals

Recognize common failure modes in Interfaces, Delegates, and Asynchronous Work, use the relevant diagnostics, and verify the correction.

25 min

08Testing and Application OrganizationBuild practical skill in testing and application organization and connect it to the outcomes of C# Fundamentals.4 lessons

Lesson 1

Testing and Application Organization: Core Concepts for C# Fundamentals

Understand the concepts, decisions, and vocabulary you need before applying Testing and Application Organization in C# Fundamentals.

25 min

Lesson 2

Set Up and Explore Testing and Application Organization in C# Fundamentals

Prepare the tools, data, project state, or test environment needed to explore Testing and Application Organization safely and repeatably.

25 min

Lesson 3

Build a Practical Testing and Application Organization Example in C# Fundamentals

Write a small test suite for one function, service, route, or component with success and failure cases.

30 min

Lesson 4

Debug Common Testing and Application Organization Problems in C# Fundamentals

Recognize common failure modes in Testing and Application Organization, use the relevant diagnostics, and verify the correction.

25 min

Portfolio integration

Capstone Project

Build a C# Service Scheduling Application

Combine the path skills in a portfolio-ready project with clear functional requirements, tests, verification evidence, and operating notes.

GuidedIndependentPortfolio

Acceptance criteria

The core workflow works from start to finish.
Invalid input or failure states are handled clearly.
The result is tested and documented.
A reviewer can reproduce the setup and verification.

Continue in Programming

Related Programming

Skill assessment

C# Fundamentals

Path Brief

Skills you will practice

Prerequisites

Tools

What you need

Learning modules

.NET and C# Project Setup: Core Concepts for C# Fundamentals

Set Up and Explore .NET and C# Project Setup in C# Fundamentals

Build a Practical .NET and C# Project Setup Example in C# Fundamentals

Debug Common .NET and C# Project Setup Problems in C# Fundamentals

Guided Lab: .NET and C# Project Setup in C# Fundamentals

Values, Types, and Control Flow: Core Concepts for C# Fundamentals

Set Up and Explore Values, Types, and Control Flow in C# Fundamentals

Build a Practical Values, Types, and Control Flow Example in C# Fundamentals

Debug Common Values, Types, and Control Flow Problems in C# Fundamentals

Guided Lab: Values, Types, and Control Flow in C# Fundamentals

Methods and Program Structure: Core Concepts for C# Fundamentals

Set Up and Explore Methods and Program Structure in C# Fundamentals

Build a Practical Methods and Program Structure Example in C# Fundamentals

Debug Common Methods and Program Structure Problems in C# Fundamentals

Guided Lab: Methods and Program Structure in C# Fundamentals

Classes, Records, and Encapsulation: Core Concepts for C# Fundamentals

Set Up and Explore Classes, Records, and Encapsulation in C# Fundamentals

Build a Practical Classes, Records, and Encapsulation Example in C# Fundamentals

Debug Common Classes, Records, and Encapsulation Problems in C# Fundamentals

Guided Lab: Classes, Records, and Encapsulation in C# Fundamentals

Collections, Generics, and LINQ: Core Concepts for C# Fundamentals

Set Up and Explore Collections, Generics, and LINQ in C# Fundamentals

Build a Practical Collections, Generics, and LINQ Example in C# Fundamentals

Debug Common Collections, Generics, and LINQ Problems in C# Fundamentals

Guided Lab: Collections, Generics, and LINQ in C# Fundamentals

Exceptions, Files, and Resources: Core Concepts for C# Fundamentals

Set Up and Explore Exceptions, Files, and Resources in C# Fundamentals

Build a Practical Exceptions, Files, and Resources Example in C# Fundamentals

Debug Common Exceptions, Files, and Resources Problems in C# Fundamentals

Interfaces, Delegates, and Asynchronous Work: Core Concepts for C# Fundamentals

Set Up and Explore Interfaces, Delegates, and Asynchronous Work in C# Fundamentals

Build a Practical Interfaces, Delegates, and Asynchronous Work Example in C# Fundamentals

Debug Common Interfaces, Delegates, and Asynchronous Work Problems in C# Fundamentals

Testing and Application Organization: Core Concepts for C# Fundamentals

Set Up and Explore Testing and Application Organization in C# Fundamentals

Build a Practical Testing and Application Organization Example in C# Fundamentals

Debug Common Testing and Application Organization Problems in C# Fundamentals

Capstone Project

Build a C# Service Scheduling Application

Acceptance criteria

Test your understanding

Related Programming

Check your starting point

Plan the capstone

Explore related paths