C# Fundamentals · Classes & OOP · Lesson 20 of 22
Constructors and Inheritance
Concept
Constructors and Inheritance
A constructor runs automatically when an object is created, usually to set initial values. The colon syntax lets one class inherit from another.
By the end of this lesson
- Explain the core idea behind Constructors and Inheritance.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
How to study this page
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
ExampleRunnable
class Animal {
public virtual void Speak() { Console.WriteLine("..."); }
}
class Dog : Animal {
public override void Speak() { Console.WriteLine("Woof!"); }
}Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Constructors and Inheritance. Then reopen the editor and prove your explanation with a small test.
You are ready to continue when you can predict, test, and explain the result.
Your turn
Add a constructor to your Course class that sets Title when the object is created.
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Console