Serializing a C# class to XML

xml-serialization.cs

[Serializable]
public class Person
{
  public string FirstName { get; set; }
  public string LastName { get; set; }
  public int Age { get; set; }
}

var serializer = new XmlSerializer(typeof(Person)); 
string xml;
using (var stringWriter = new StringWriter())
{
   serializer.Serialize(stringWriter, new Person { FirstName = "John", LastName = "Doe", Age = 42 });
   xml = stringWriter.ToString();
}