Objects and classes

C# is an object-oriented language. A class is a blueprint, and an object is an instance of that class. Use the new keyword to instantiate an object.

class Cloud {
    public string Shape;
    public int Altitude;

    public Cloud(string shape, int altitude) {
        Shape = shape;
        Altitude = altitude;
    }
}

// In Main:
Cloud myCloud = new Cloud("cumulus", 3000);

How it reads

• public string Shape declares a public field
• public Cloud(...) is a constructor used to initialize the object
• new Cloud(...) creates a new instance on the heap

Cloud tip: Fields are marked with access modifiers like public or private. private fields can only be accessed within the class itself.