Query Reuse : select « LINQ « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. LINQ
3. select

using System;
using System.Linq;

static class QueryReuse {
    static double Square(double n) {
        Console.WriteLine("Computing Square(" + n + ")...");
        return Math.Pow(n, 2);
    }

    public static void Main() {
        int[] numbers = { 1, 2, 3 };

        var query =
          from n in numbers
          select Square(n);

        foreach (var n in query)
            Console.WriteLine(n);

        for (int i = 0; i < numbers.Length; i++)
            numbers[i] = numbers[i] + 10;

        foreach (var n in query)
            Console.WriteLine(n);
    }
}