נתון פרויקט שהוגדרו בו ארבע מחלקות ושני ממשקים:

interface IConnectable {void Connect(string network);}
interface IRemoteControllable { void PerformAction(); }
public class EDevice {
    private string model;
    public EDevice(string model) { this.model = model; }
    public void PrintInfo() {
        Console.WriteLine("Device: " + model);
    }
}
public class SmartLamp : EDevice, IRemoteControllable {
    public SmartLamp(string model) : base(model) {
    }
    public void PerformAction() {
        Console.WriteLine("Lamp: Lighting up");
    }
}
public class SmartTV : EDevice, IConnectable,
IRemoteControllable {
    public SmartTV(string model) : base(model) {
    }
    public void Connect(string net) {
        Console.WriteLine("TV connected to " + net);
    }
    public void PerformAction() {
        Console.WriteLine("TV: Playing movie");
    }
}
public class RobotVacuum : EDevice, IConnectable {
    public RobotVacuum(string model) : base(model) {
    }
    public void Connect(string net) {
        Console.WriteLine("Vacuum ready on " + net);
    }
}