C# Basics

Explore & Discover

C# powers games like Pokémon GO and almost everything built in Unity. Start by watching "C# Tutorial for Beginners" by Mosh Hamedani on YouTube — just the first 30 minutes. Notice how C# looks compared to Scratch blocks: instead of puzzle pieces, you type instructions. Visit dotnet.microsoft.com/en-us/learn and read the "What is C#?" page. C# was invented at Microsoft in 2000, and today it's one of the top five most-used languages on earth. Developers in Salt Lake City use it every day at companies like Domo and Ancestry. Don't install anything yet — just explore and notice what kinds of problems C# solves. You're ready for the next step when you can name two things C# is commonly used to build.

Learn the Basics

Now set up your coding environment. Go to replit.com, create a free account, and start a new C# Repl. You'll see a file called main.cs already open. Read what's already there: using System; a class, a Main method. This is the skeleton every C# program starts with. Look up what "namespace" means on Microsoft's beginner docs at learn.microsoft.com/en-us/dotnet/csharp/tour-of-csharp. Change the console output to print your name and your favorite game. Run it. Celebrate when it works. Then deliberately break it — delete a semicolon — and read the error message carefully. Error messages are clues, not failures. You're ready for the next step when you can fix a broken C# program by reading its error message.

Build Your First Project

C# is strongly typed, which means you tell the computer exactly what kind of data each variable holds. Create a new Replit C# project and declare five variables: your name (string), your age (int), your GPA (double), whether you like coding (bool), and your first initial (char). Print them all with Console.WriteLine. Then write an if/else statement: if your age is over 12, print "Middle school coder"; otherwise print "Elementary coder". Next add a for loop that counts from 1 to 10 and prints each number. These three things — variables, if/else, loops — are the building blocks of every program ever written. Microsoft's C# Fundamentals course at learn.microsoft.com/en-us/training/paths/csharp-first-steps is free and excellent. You're ready for the next step when your program runs all three sections without errors.

Experiment & Iterate

Methods (sometimes called functions) let you write code once and use it many times. In your Replit C# project, write a method called Greet that takes a name as a string and prints "Hello, [name]! Welcome to the game." Call it three times with different names. Then write a method called AddNumbers that takes two integers and returns their sum — use the return keyword. Call it and print the result. Now build a mini quiz game: write a method called AskQuestion that prints a question, reads the user's answer with Console.ReadLine(), and returns whether they got it right. Chain three questions together. Khan Academy's programming logic concepts at khanacademy.org/computing help reinforce why methods matter. You're ready for the next step when your quiz runs three questions and keeps score.

Advanced Techniques

Classes are the heart of C# — it's an object-oriented language, meaning you model real things as objects with properties and behaviors. Create a class called Player with properties: Name, Health, and Score. Add a method called TakeDamage that reduces Health and a method called AddPoints that increases Score. In your Main method, create two Player objects and make them interact — player one attacks player two, player two attacks back. This is exactly how game engines like Unity track characters. Visit learn.microsoft.com/en-us/dotnet/csharp/fundamentals/tutorials/oop for Microsoft's official OOP tutorial. Then add a method called IsAlive that returns true if Health is above zero. You're ready for the next step when two Player objects can fight each other and one is declared the winner.

Final Project Showcase

Build a complete C# project: a text-based adventure game set somewhere in Utah — maybe exploring Zion's Narrows, finding Delicate Arch, or navigating a blizzard on Alta. Design at least three rooms or locations. Use a class for the Player, a class for Item, and a class for Location. Connect them: the player can pick up items, move between locations, and win or lose based on choices. Use a while loop to keep the game running until the player wins or their health hits zero. Post your finished Repl publicly, share the link with a friend or family member, and ask them to play it cold without hints. Watch what confuses them — that feedback is your first user test. You're ready for the next step when a person who didn't write the code can play your game from start to finish.