Encapsulating with properties

Properties combine a private field with accessors called get and set. This protects class data by controlling how values are read or written.

class SkyItem {
    private int _density;
    public int Density {
        get { return _density; }
        set {
            if (value >= 0) _density = value;
        }
    }
}

How it reads

• private int _density hides the internal value
• get { return _density; } runs when reading the property
• set { ... } runs when writing, with value representing incoming data

Cloud tip: Use auto-implemented properties like public string Name { get; set; } when no validation logic is needed.