public abstract class UnitaDiMisura  {

    protected UnitaDiMisura(){ }

​

    public abstract string Sigla { get; }

    public double Value { get; set; }

}

​

​

public class Wattaggio : UnitaDiMisura {

    public Wattaggio() { }

​

    public Wattaggio(double val) : this() {

        this.Value = val;

    }

    private const string _sigla = "W";

    public override string Sigla { get{ return _sigla; } }

}

​

public class Lampadina

{

    public Lampadina(Wattaggio w){

        this.Watt = w;

    }

    public Wattaggio Watt {get; private set;}

}

​

​

public class LampadinaDto<T> where T : UnitaDiMisura{

    public LampadinaDto(double val) {

        this.UnitaDiMisura = default(T);

        this.UnitaDiMisura.Value = val;

    }

    public T UnitaDiMisura { get; private set;}

​

}