Enum deprecated c#

Question

I have a deprecated (Obsolete) function which returns an enum, and I have a new function which returns a List of enums.

One of the enum values is used only in the deprecated function, so is it possible to set an enum member as obsolete (because it can't be in the List)?

Answer 1

Sure, you can:

public enum EE
{
    A,

    [Obsolete]
    B
}

Answer 2

Actually, it is possible to generate either compiler warnings or compiler errors.

public enum TestEnum
{
    A,
    [Obsolete("Not in use anymore")]
    B,
    [Obsolete("Not in use anymore", true)]
    C,
}

public class Class1
{
    public void TestMethod()
    {
        TestEnum t1 = TestEnum.A; //Works just fine.
        TestEnum t2 = TestEnum.B; //Will still compile, but generates a warning.
        TestEnum t3 = TestEnum.C; //Will no longer compile. 
    }
}

This will work wherever you use an [Obsolete] attribute.