Lesson 1: C# setup and .NET foundations: Concept walkthrough

Concept Explanation

This lesson introduces the basic shape of a C# program and helps the learner get comfortable with running code in a .NET environment. The goal is not to memorize theory, but to understand what a minimal program looks like, where execution begins, and how a simple statement produces visible output. By the end, the learner should feel confident opening a project, changing a line, and rerunning it to confirm the result.

Where to Put the Code

1. Define color and position variables at the top.
2. Create shape drawing or placement logic in the middle.
3. Render output (print, canvas, SVG, or styled block) at the end.

Command Reference

• Run the program once, then change the learner name and confirm the output updates.
• Point to the line that actually performs the output and explain its role in plain words.
• Use this lesson to connect three basics: a using directive, a value stored in a variable, and a printed result.
• After editing the message, rerun the program and verify that the console shows exactly what you expected.

Step-by-step Guide

1. Run the starter code and read the output before making any edits.
2. Change the stored name or message text to something personal and run the program again.
3. Explain in one sentence what Console.WriteLine is doing in this example.
4. Make one small improvement for readability, such as a clearer variable name or a cleaner message.
5. Finish with a quick check: does the program build, run, and print the updated text?

Practice Exercises

• Create a similar example that prints a course title and the current lesson number.
• Modify the program so it prints two lines instead of one.
• Write a fresh version that greets a different learner using a variable and string interpolation.

Coding Challenges

• Build a tiny welcome screen that prints a name, track, and short status message in a readable way.
• Compare hard-coded text with text built from variables, and explain which is easier to update later.

Mini Practice Tasks

• Rename one variable so its purpose is obvious at a glance.
• Add one extra output line and rerun the program.
• Write a one-line note describing what this first C# program demonstrates.