Empty cases can fall through

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/*
C#: The Complete Reference
by Herbert Schildt

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Empty cases can fall through.

using System;

public class EmptyCasesCanFall {
public static void Main() {
int i;

for(i=1; i < 5; i++) switch(i) { case 1: case 2: case 3: Console.WriteLine("i is 1, 2 or 3"); break; case 4: Console.WriteLine("i is 4"); break; } } } [/csharp]