Bugs and Suggestions

[HttpException]: The controller for path '/Token' was not found or does not implement IController.
   at System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType)
   at System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName)
   at System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory)
   at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
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I have an application that needs to scan folders and if the folder is empty it should return the name of the folder.This how my folders are been structure
 
1. You have the Main Folder "Folder 1"
2. Inside the Main Folder "Folder 1" they is a Sub Folder - "Folder 2" 
3. Inside Sub Folder "Folder 2" they is "Multiple Sub Folder" namely 
a. "Folder 001"
b. "Folder 002"
c. "Folder 003"
4. inside each "Multiple Sub Folder" they are other Folders with the same name e.g
i. "Sub-Sub Folder 1"
ii. "Sub-Sub Folder 2"
iii. Sub-Sub Folder 3"
 
In the system i need to just select the Sub Folder - "Folder 2" and the system needs to scan "Multiple Sub Folders" and "Sub-Sub Folder 2" and if the "Sub-Sub Folder 2" is empty the it should return the name of the "Multiple Sub Folder" e.g "Folder 001","Folder 002"