Mono-Mongo/Default serialization

Main.cs

using System;

using MongoDB.Driver;

namespace Race
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			// Get a Reference to the Client Object.
			string connectionString = "mongodb://localhost";
			MongoClient client = new MongoClient(connectionString);

			// Get a Reference to a Server Object.
			MongoServer server = client.GetServer();

			// Get a Reference to a Database Object.
			MongoDatabase database = server.GetDatabase("Race");

			// Get a Reference to a Collection Object.
			MongoCollection collection = database.GetCollection<Participant>("Participants");

			// Insert a Document.
			Participant participant1 = new Participant("Jean-Claude", "Duss", 62);
			collection.Insert(participant1);
			
			Participant participant2 = new Participant("Thierry", "La France");
			collection.Insert(participant2);
		}
	}
}

Participant.cs

using System;

namespace Race
{
	public class Participant
	{
		#region Fields

		private string firstName = string.Empty;
		private string lastName = string.Empty;
		private Nullable<byte> age = null;

		#endregion

		#region Constructors

		/// <summary>
		/// Initializes a new instance of the <see cref="Race.Participant"/> class.
		/// </summary>
		/// <param name='firstName'>
		/// First name.
		/// </param>
		/// <param name='lastName'>
		/// Last name.
		/// </param>
		public Participant(string firstName, string lastName)
		{
			this.firstName = firstName;
			this.lastName = lastName;
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="Race.Participant"/> class.
		/// </summary>
		/// <param name='firstName'>
		/// First name.
		/// </param>
		/// <param name='lastName'>
		/// Last name.
		/// </param>
		/// <param name='age'>
		/// Age.
		/// </param>
		public Participant(string firstName, string lastName, Byte age)
		{
			this.firstName = firstName;
			this.lastName = lastName;
			this.age = age;
		}

		#endregion

		#region Properties

		/// <summary>
		/// Gets or sets the first name.
		/// </summary>
		/// <value>
		/// The first name.
		/// </value>
		public string FirstName
		{
			get { return this.firstName; }
			set { this.firstName = value; }
		}

		/// <summary>
		/// Gets or sets the last name.
		/// </summary>
		/// <value>
		/// The last name.
		/// </value>
		public string LastName
		{
			get { return this.lastName; }
			set { this.lastName = value; }
		}

		/// <summary>
		/// Gets or sets the age.
		/// </summary>
		/// <value>
		/// The age.
		/// </value>
		public Nullable<byte> Age
		{
			get { return this.age; }
			set { this.age = value; }
		}

		#endregion
	}
}