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C# Foundations

A modern, typed language for apps, APIs and games.

Learn the C# that powers .NET services, desktop tools, Unity games and enterprise APIs. Start with types and nullability, then build classes, LINQ queries and asynchronous HTTP endpoints.

10 lessons 2 hours Certificate included Self-paced

Start the first lesson View curriculum

Reviewed and updated October 2026 · Free to start

What you will learn

By the end, you can do this.

Write null-safe C# with clear types
Model data with classes and records
Query collections with LINQ
Build a small asynchronous ASP.NET API

Curriculum

10 lessons in 1 module

290 practice drills included for extra repetition

0/10 complete

01Variables and control flowC# variables are typed, and branching and loops decide what runs next. 12 min 02Methods and parametersMethods group reusable code, and their signatures describe what goes in and out. 12 min 03Interfaces and polymorphismInterfaces are contracts that let many types plug into the same code. 13 min 04LINQ in depthLINQ builds lazy pipelines that flatten, group and join collections. 14 min 05Testing with xUnitxUnit turns expectations into repeatable, runnable checks with dotnet test. 14 min 06Types and nullabilityC# is statically typed, and nullable reference types make absence explicit. 12 min 07Classes, records and object designClasses model behaviour; records give value-based data a concise shape. 14 min 08Collections and LINQLINQ turns filtering and shaping collections into readable pipelines. 14 min 09Async and error handlingAsynchronous code keeps a service responsive; exceptions are part of the contract. 14 min 10A minimal ASP.NET APIMap endpoints, validate input and return accurate HTTP responses. 15 min

Certification

Finish the course. Prove the skill.

Complete every lesson, then pass a timed assessment to earn the C# Foundations Certificate. Each credential has a unique ID and a QR code that resolves to a live public record.

10 randomized questions
30 minute limit · 80% to pass
3 attempts per enrolment
Verifiable by QR or credential ID

Certification details Verify a credential

Pro members get five certification attempts and unlimited timed mock exams. Compare Pro

EduByte.tech

EduByte · Skills certificationIssued 26 Oct 2026

This certifies that

Your name

has successfully completed the assessed program

C# Foundations

Write null-safe C# with clear typesModel data with classes and recordsQuery collections with LINQ

C# Foundations

By the end, you can do this.

10 lessons in 1 module

Finish the course. Prove the skill.

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