Inheritance

Relax. We'll talk through this in plain words — no textbook voice.

Inheritance is a feature that lets one class pick up and use the fields/properties/methods of another class. You write common behavior once in a base class, and derived classes can reuse it, which cuts down on repeated code.

csharp

class Vehicle
{
    public string Brand = "Ford";

    public void Start()
    {
        Console.WriteLine("Vehicle started");
    }
}

class Car : Vehicle
{
    public string ModelName = "Mustang";
}

class Program
{
    static void Main(string[] args)
    {
        Car myCar = new Car();
        Console.WriteLine(myCar.Brand + " " + myCar.ModelName);
        myCar.Start();
    }
}

How it works

Vehicle is the base class.
Car : Vehicle means Car inherits from Vehicle.
Car object gets Brand and Start() from Vehicle.

You should see

Ford Mustang Vehicle started