How check Soap header on client side

Question

Hi I am begginer with asmx web service. On web service side I add ticket in soap header if user call web method addTicket.

public class TicketIdentity
{
    private string ticket;

    public string Ticket
    {
        get { return ticket; }
    }

    public TicketIdentity(string _ticket)
    {
        this.ticket = _ticket;
    }
}

public class TicketHeader : SoapHeader
{
    public string Ticket;
    public TicketHeader(string ticket)
    {
        Ticket = ticket;
    }
    public TicketHeader()
    { }
}

[SoapHeader("Ticket", Direction = SoapHeaderDirection.Out)]
public void addTicket()
{
//...
TicketIdentity ticket        = new TicketIdentity(secureUtil.GetGuid());
Application[ticket.Ticket]   = ticket;
Ticket                       = new TicketHeader(ticket.Ticket);
}

How can I check on client side in proxy class, if the proxy object have Ticket ? Here is a code of proxy:

namespace proxy 
{    
    /// <remarks/>
    [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "2.0.50727.1432")]
    [System.Diagnostics.DebuggerStepThroughAttribute()]
    [System.ComponentModel.DesignerCategoryAttribute("code")]
    [System.Web.Services.WebServiceBindingAttribute(Name="ServiceSoap", Namespace="http://tempuri.org/")]
    public partial class Service : System.Web.Services.Protocols.SoapHttpClientProtocol 
    {
        [AttributeUsage(AttributeTargets.Method)]
        //...

        private TicketHeader ticketHeaderValueField;

        public TicketHeader TicketHeaderValue {
            get {
                return this.ticketHeaderValueField;
            }
            set {
                this.ticketHeaderValueField = value;
            }
        }

        //...

        bool checkTicket()
        { 
            //...
        }
    }

   //...
}

I would like have method checkTicket in class Service, which check if have user ticket. Can somebedy help me ?