Shows how queries can be reused

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class MainClass {
public static void Main() {
int[] numbers = new int[] { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
var lowNumbers =
from n in numbers
where n <= 3 select n; Console.WriteLine("First run numbers <= 3:"); foreach (int n in lowNumbers) { Console.WriteLine(n); } for (int i = 0; i < 10; i++) { numbers[i] = -numbers[i]; } Console.WriteLine("Second run numbers <= 3:"); foreach (int n in lowNumbers) { Console.WriteLine(n); } } } [/csharp]

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