PrivateEnumValueAsDynamic.cs

void Main()
{
    int barInt;

    object barObj = Foo.GetBar();
    barInt = (int)barObj; // Success!
    
    dynamic barDynamic = Foo.GetBar();
    barInt = (int)barDynamic; // RuntimeBinderException: Cannot convert type 'System.Enum' to 'int'
}

public class Foo
{
    public static object GetBar()
    {
        return Bar.Baz;
    }

    private enum Bar
    {
        Baz
    }
}