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An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll

faniedtfaniedt Johannesburg, South AfricaPosts: 1Member

I have a MVC 4 application that calls an external web service. I add the web service as a web reference (WipoSvc). I created a class which calls the web service and uses on of its methods to gather data.

using WipoExtract.WipoSvc;

namespace WipoExtract
public class GetIasrFromWS
public string publicationNumber = "";
public string iaNumber = "";
public DateTime ifDate;
public string priCountry = "";
public string priNumber = "";
public string priDate = "";
public string iClassification = "";
public string title = "";
public string strAbstract = "";
public DataTable dtApplicants = new DataTable();
//public DataTable dtInventors = new DataTable();

public void GetIasrData(string applicationNo)
PatentScopeService ws = new PatentScopeService();
ws.PreAuthenticate = true;

I am calling the class from my HomeController.cs.

using System.Web.Mvc;
using WipoExtract.Models;

namespace WipoExtract.Controllers
public class HomeController : Controller
public ActionResult Index()
ViewBag.Message = "Modify this template to jump-start your ASP.NET MVC application.";

return View();

public ActionResult Index(FormCollection formCollection)
string txtAppNo = formCollection["txtAppNo"];
@ViewBag.AppNo = txtAppNo;

GetIasrFromWS iasr = new GetIasrFromWS();

I get the following error message when it creates an instance of the web service.

An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll
[System.StackOverflowException] {Cannot evaluate expression because the current thread is in a stack overflow state.}

I am getting the error on the following line in my class.

PatentScopeService ws = new PatentScopeService();

Any assistance would be appreciated.

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