XML Serialization in .NET

// PhoneNumber.cs
//
// Written by Liong Ng

using System;

public class PhoneNumber
{
   public PhoneNumber()
   {
   }

   public PhoneNumber( string areaCode, string number )
   {
      this.areaCode = areaCode;
      this.number = number;
   }

   public string AreaCode
   {
      get { return areaCode; }
      set { areaCode = value; }
   }

   public string Number
   {
      get { return number; }
      set { number = value; }
   }

   public override string ToString()
   {
      return areaCode + " " + number;
   }

   private string areaCode;
   private string number;
}