VS2008 C# cannot get return/export values from SAP (one way connection yet)

Question

Hello Experts,
I have successfully established connection to SAP by using Visual Studio 2008 (C#) and web services:
-     I am able to login into the SAP-System with my C#-Application
-     I am able to call and run functions with my C#-Application
-     I am able to passing over vales from my C#-Application to the function module (importing variables = ok)
The problem I face now is getting return values from the function module (getting values of the exporting variables). I just have no idea how to call the u201CResponse-methodu201D correctly in C#.
I think the problem is hided in the wsdl-xml-file.
Here are my codes (only C# codes are really relevant) I post them step by step:
ABAP CODE OF FUNCTION MODULE:
FUNCTION Z_GET_BP_DATA.
TABLES: but000.
Data: ls_test type but000,
      lv_bpid type BU_PARTNER.
u201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201D
u201D importing parameter BPID = type string   u201D
u201D exporting parameter BPNAME = type string u201D
u201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201Du201D
lv_bpid = BPID.
SELECT SINGLE *  from but000 into ls_test
  where PARTNER = lv_bpid.
BPNAME = ls_test-NAME_LAST.
ENDFUNCTION.
[Here|http://ng-webservice.com/myxml.xml] is code of my wsdl-xml-file:

Answer 1

C
APPLICATION MAIN CODE:
using System;
using System.Net;
using System.Collections.Generic;
using System.Text;
using System.Web.Services.Protocols;
using System.Web.Services;
namespace test
    class Program
        static void Main(string[] args)
            try
                //Sample Project for calling WS in SAP and writing data
                string var_bpid = "0000000082";
                string var_bpname;
                CookieContainer cookie = new CookieContainer();
                webref_get_bp_data.service _proxy1 = new test.webref_get_bp_data.service();
                webref_get_bp_data.ZGetBpDataResponse _proxy3 = new test.webref_get_bp_data.ZGetBpDataResponse();
                test.webref_get_bp_data.ZGetBpData myref = new test.webref_get_bp_data.ZGetBpData();
                test.webref_get_bp_data.ZGetBpDataResponse myresponse = new test.webref_get_bp_data.ZGetBpDataResponse();
                _proxy1.Credentials = new NetworkCredential("MYUSER", "MYPASSWORD");
                _proxy1.CookieContainer = cookie;
                myref.Bpid = var_bpid; // myref gets an id for passing over to the function module
                _proxy1.ZGetBpData(myref); // call/run function module with given bpid
                var_bpname = _proxy1.ZGetBpData(myref);
                var_bpname = myresponse.Bpname; // HOW TO GET EXPORTING VALUE???
                Console.WriteLine(myref.Bpid);
                Console.WriteLine(var_bpname);
                cookie = _proxy1.CookieContainer;
                Console.WriteLine("Finish proxy1");
                string response = Console.ReadLine();
            catch (SoapException exc)
                Console.WriteLine("Exception thrown");
                throw exc;
                string response = Console.ReadLine();