Issue while calling Controller Method - asp.net-mvc

Question

I have two controllers called FormController and CorticonResponseController.
FormController:
[HttpPost]
public ActionResult Index(FormCollection formCollection)
{
Session["CorticonServiceEndpoint"] = this.CorticonServiceEndpoint;
Session["CorticonServiceName"] = this.CorticonServiceName;
Session["CorticonServiceMajorVersion"] = this.CorticonServiceMajorVersion;
Session["CorticonServiceMinorVersion"] = this.CorticonServiceMinorVersion;
Session["payLoad"] = “Test”;
return RedirectToAction("CorticonIndex ", “CorticonResponseController”);
}
CorticonResponseController:
public ActionResult CorticonIndex()
{
string payLoad = (string)Session["payLoad"];
string CorticonServiceEndpoint = (string)Session["CorticonServiceEndpoint"];
string CorticonServiceName = (string)Session["CorticonServiceName"];
string CorticonServiceMajorVersion = (string)Session["CorticonServiceMajorVersion"];
string CorticonServiceMinorVersion = (string)Session["CorticonServiceMinorVersion"];
var viewModel = this.Model.GetViewModel(payLoad);
return View ("Default", viewModel);
}
Here, I was sending some information from FormController to CorticonResponseController. In CorticonResponseController, I made some calculations and returning the view with the model.
Hence the URL is changing from http://localhost:35583/banking/open-an-account To http://localhost:35583/banking/open-an-account/CorticonIdex.
However, I don’t want to change the URL so I have modified my code as below.
CorticonResponseController:
public void CorticonIndex()
{
string payLoad = (string)Session["payLoad"];
string CorticonServiceEndpoint = (string)Session["CorticonServiceEndpoint"];
string CorticonServiceName = (string)Session["CorticonServiceName"];
string CorticonServiceMajorVersion = (string)Session["CorticonServiceMajorVersion"];
string CorticonServiceMinorVersion = (string)Session["CorticonServiceMinorVersion"];
var viewModel = this.Model.GetViewModel(payLoad);
TempData["ResponseController"] = viewModel;
}
FormController:
[HttpPost]
public ActionResult Index(FormCollection formCollection)
{
Session["CorticonServiceEndpoint"] = this.CorticonServiceEndpoint;
Session["CorticonServiceName"] = this.CorticonServiceName;
Session["CorticonServiceMajorVersion"] = this.CorticonServiceMajorVersion;
Session["CorticonServiceMinorVersion"] = this.CorticonServiceMinorVersion;
Session["payLoad"] = “Test”;
CorticonResponseController obj = new CorticonResponseController();
obj.CorticonIndex();
CorticonResponseModel viewModel = (CorticonResponseModel)TempData["ResponseController"];
string controllerName = DecisionServiceProgram.GetResponseWidgetName();
return View("Default", viewModel);
}
Here,In my FormController, I was calling CorticonResponseController method and getting CorticonResponseModel data using TempData and then returning the view.
I am facing the issues while executing the controller.
Can someone help me how to resolve the issue?