Include kerberos ticket in soap message absoleto SoapContext.Security - soap

Question

I include a Kerberos ticket header in a request to a service, but as I'm doing works, but says that is SoapContext.Security absoleto.
Can anyone help me fix this?
The code I have is this:
private void button1_Click(object sender, EventArgs e)
{
try
{
//default option selected is Kerberos.
string option = "Kerberos";
if (radioButton1.Checked)
option = "UserName";
if (radioButton2.Checked)
option = "Kerberos";
//declare any Security Token
SecurityToken token = null;
switch (option)
{
case "UserName":
{
try
{
//create a username Token.
UsernameToken unToken = new UsernameToken(textBox1.Text, textBox2.Text, PasswordOption.SendPlainText);
//assign the any SecurityToken an Username Token.
token = unToken;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return;
}
break;
}
case "Kerberos":
{
try
{
Console.WriteLine(System.Net.Dns.GetHostName());
//create a kerberos Token.
KerberosToken kToken = new KerberosToken(System.Net.Dns.GetHostName());
//assign the any SecurityToken an Username Token.
token = kToken;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return;
}
break;
}
default:
{
break;
}
}
if (token == null)
throw new ApplicationException("Unable to obtain security token.");
// Create an instance of the web service proxy that has been generated.
SecureServiceProxy.WebService1 proxy = new ClientTest.SecureServiceProxy.WebService1();
proxy.SetPolicy("KerberosClient");
//set the time to live to any value.
proxy.RequestSoapContext.Security.Timestamp.TtlInSeconds = 60;
// Add the SecurityToken to the SOAP Request Context.
proxy.RequestSoapContext.Security.Tokens.Add(token);
// Sign the SOAP message with a signatureobject.
proxy.RequestSoapContext.Security.Elements.Add(new MessageSignature(token));
// Create and Send the request
long a = long.Parse(textLong1.Text);
long b = long.Parse(textLong2.Text);
//call the web service.
long result = proxy.perform(a, b);
//Display the result.
MessageBox.Show(a + " + " + b + " = " + result.ToString());
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
MessageBox.Show(ex.Message);
return;
}
}
And my warning appears saying that it is absoleto the following lines of code:
proxy.RequestSoapContext.Security.Timestamp.TtlInSeconds = 60;
// Add the SecurityToken to the SOAP Request Context.
proxy.RequestSoapContext.Security.Tokens.Add(token);
// Sign the SOAP message with a signatureobject.
proxy.RequestSoapContext.Security.Elements.Add(new MessageSignature(token));
But do not know how to solve