C# 0 The Complete Reference

select

. It creates a class called 

EmailAddress

 that contains two properties. The first holds a person’s name. The second 

contains an e-mail address. The program then creates an array that contains several 

EmailAddress

 entries. The program uses a query to obtain a list of just the e-mail addresses 

by themselves.

// Return a portion of the range variable.

using System;

using System.Linq;

class EmailAddress {

  public string Name { get; set; }

  public string Address { get; set; }

  public EmailAddress(string n, string a) {

    Name = n;

    Address = a;

  }

}

www.freepdf-books.com

---

558

 

P a r t   I :  

T h e   C #   L a n g u a g e

class SelectDemo2 {

  static void Main() {

    EmailAddress[] addrs = {

         new EmailAddress("Herb", "[e-mail]"),

         new EmailAddress("Tom", "[e-mail]"),

         new EmailAddress("Sara", "[e-mail]")

    };

    // Create a query that selects e-mail addresses.

    var eAddrs = from entry in addrs

                 select entry.Address;

    Console.WriteLine("The e-mail addresses are");

    // Execute the query and display the results.

    foreach(string s in eAddrs) Console.WriteLine("  " + s);

  }

}

The output is shown here:

The e-mail addresses are

  [e-mail]

  [e-mail]

  [e-mail]

Pay special attention to the