[Visual Basic]
<WebMethod()> _
Public Function EncryptResponse(ByVal str As String) As String
    Dim context As SoapContext = RequestSoapContext.Current
    Dim tok As X509SecurityToken = Nothing

    Dim token As X509SecurityToken
    For Each token In context.Security.Tokens
        If Not token Is Nothing Then
            tok = token
        End If
    Next

    ' Create a new instance of the EncryptedData class passing in the security token.
    Dim enc As EncryptedData = New EncryptedData(tok)

    ' Add the instance of EncryptedData to the SOAP response.
    ResponseSoapContext.Current.Security.Elements.Add(enc)
    Return str
End Function
[C#]
[WebMethod]
public string EncryptResponse( String str )
{          
   SoapContext context = RequestSoapContext.Current;
            
   X509SecurityToken tok = null;

   foreach( X509SecurityToken token in context.Security.Tokens)
   {                       
      if( token != null )
      {
         tok = token;
      }
   }
   // Create a new instance of the EncryptedData class passing in the security token.
   EncryptedData enc = new EncryptedData( tok );                        

   // Add the instance of EncryptedData to the SOAP response.
   ResponseSoapContext.Current.Security.Elements.Add( enc );
   return str;
      }