Enum is Reference Type or Value Type?

Question

I used Enum property in my EntityFramework 5 class, but in the database this field is nullable. Visual studio gives the error that this property must be a nullable property.

Answer 1

public enum TestReferenceOrValue
{
    one, two, three    
}
var a = TestReferenceOrValue.one;
var b = a;
b = TestReferenceOrValue.three;

If enums are by reference, changing b affects a
Console.Write(a); → one
Console.Write(b); → three

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Answer 2

suppose we have enum

public enum eCategory
{
    health ,        
    Weapon
}

and a type of eCategory such as :-

eCategory currentcategory;

then currentcategory is of value type

Answer 3

If you do myEnum.SomeValue it will be a value type.

Answer 4

System.Enum is a reference type, but any specific enum type is a value type. In the same way, System.ValueType is a reference type, but all types inheriting from it (other than System.Enum) are value types.

So if you have an enum Foo and you want a nullable property, you need the property type to be Foo?.