// CS0019: Operator `+' cannot be applied to operands of type `Test.Zub' and `Test.Zub' // Line : 11 using System; class Test { enum Zub :byte { Foo = 99, Bar, Baz } static void Main () { Zub a = Zub.Foo, b = Zub.Bar; object v = (a + b); } }