const int SpeedOfLight = 300_000;
                       = 3_00000;

int a = 3_000 + b;
int x = 0xAB_01;

const int MinimalWidth = 5;

enum E { A, B, C }

E e = E.A;

enum E : int { ... }
enum E : byte { ... }

---

Random r = ...

r.Next(int from, int to)

< from = 0, to )

(int) e
int a = ...
E e = (E) a