Why is a Nullable not a valid Custom Attribute Parameter when T is?

Question

If I have an enum like this

public enum Hungry
{
    Somewhat,
    Very,
    CouldEatMySocks
}

and a custom attribute like this

<         


        

Answer 1

To get around this create another initializer in your Attribute:

class Program
{
  [Hunger()]
  static void Main(string[] args)
  {
  }

  public sealed class HungerAttribute : Attribute
  {        
    public Hungry? HungerLevel { get; }
    public bool IsNull => !_HungerLevel.HasValue;

    public HungerAttribute()
    {
    }

    //Or:
    public HungerAttribute(Hungry level)
    {
      HungerLevel = level;
    }
  }

  public enum Hungry { Somewhat, Very, CouldEatMySocks }
}

I understand that you're not going to use both properties.