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

Instead of creating nullable enum, you can create default value for that enum. Enum pick default from 1st value, so set your enum like this

public enum Hungry
{
    None,
    Somewhat,
    Very,
    CouldEatMySocks
}

in your code you could do this to check for null

if(default(Hungry) == HungerLevel)//no value has been set