Is is possible to randomize an if statement

Hi,
My question which i've been trying to search for is whether i can randomize an if statement meaning this The program can choose to randomly choose which if statement to execute rather then actually choose one. Here is my scenario.

1) After i pull randomly 1 to 3 numbers from my list which i have already coded for.
2) For each number i pull from the list I want to add an If statement which says
3) 1 can be added to the number pulled , or 1 can be subtracted to the number or the program can just do nothing and just retrieve the number and pass it(eg.
if the number is 16, the if statement can add 1 which makes it 17, or subtract 1 which makes it 15, or it can keep it at 16.)
4) I want to randomized these if statements meaning that the program can choose either
if statements to run. It doesnt have to choose. one.

Is this possible. or do I need to use a different option to make this happent other then an If statement. If I don't use an if statement is there another way for me to achieve this.. Thanks any comments or help will greatly be appreciated..

Oh! Sorry it should be C#...

Something like this fragment maybe

Code:

---

using System;

Random rand = new Random();

switch( (3 & (1+rand.Next())) - 1 )
{
  case 0:
    // Add one
    break;
  case 1:
    // Subtract one
    break;
  case 2:
    // Leave as is
    break;
}

---

Thanks very much for your help and .. for the reply SMA, I'm going to try it out..