How does this program work? I don't understand. Why 7?

Question

enum Lngs{Java=2, cpp=4, C=6, CS}
static void Main(string [] args) {
Lngs x=Lngs. CS
switch (x) {
case Lngs. CS:
Console. Write ((int) Lngs.CS);
break;
}
}

Answer 1

I think you need to supply a value for CS in d enum declaration