Post Serialized Objects (Data) in ASP.NET

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// Summary description for Person
/// </summary>
[Serializable]
public class Person
{
    private string _FirstName = string.Empty;

    public string FirstName
    {
        get { return _FirstName; }
        set { _FirstName = value; }
    }

    private string _LastName = string.Empty;

    public string LastName
    {
        get { return _LastName; }
        set { _LastName = value; }
    }
        
    public Person(string firstname, string lastname)
    {
        _FirstName = firstname;
        _LastName = lastname;
    }

    public override string ToString()
    {
        return FirstName + " " + LastName;
    }
}