Create and retrive session

PersonSession person = new PersonSession(int.Parse(txtPersonId.Text), txtName.Text, int.Parse 

                                  (txtAge.Text),   chkEmailValidated.Checked);
PersonSession.CreatePersonSession(person);

------------------------

PersonSession person = PersonSession.GetPersonSession();
       if (person == null)

       {
            Response.Redirect("NotLogged.aspx");
       }

       else
            this.Person = person;

public PersonSession Person { get; private set; }

------------------

public class PersonSession

{

 const string KEY = "personDetails";
    public int Id
    {
        get; private set;
    }
    public string Name
    {
        get; private set;
    }
    public int Age
    {
        get; private set;
    }
    public bool HasEmailValidated
    {
        get; private set;
    }
 public PersonSession(int id,string name,int age,bool emailValidated)
 {
        this.Id = id;
        this.Name = name;
        this.Age = age;
        this.HasEmailValidated = emailValidated;
 }
    public static PersonSession GetPersonSession()
    {
        return HttpContext.Current.Session[KEY] as PersonSession;
    }
    public static void CreatePersonSession(PersonSession person)
    {
        HttpContext.Current.Session[KEY] = person;
    } 

}