c# - IRazorViewEngine outside mvc -

i trying implement html template rendering using razor rendering engine. have windows service application partially uses mvc 6 , have found successful implementation works web part of application.

public viewrenderservice(irazorviewengine razorviewengine,     itempdataprovider tempdataprovider,     iserviceprovider serviceprovider) {     _razorviewengine = razorviewengine;     _tempdataprovider = tempdataprovider;     _serviceprovider = serviceprovider; }  public async task<string> rendertostringasync(string viewname, object model) {     var httpcontext = new defaulthttpcontext { requestservices = _serviceprovider };     var actioncontext = new actioncontext(httpcontext, new routedata(), new actiondescriptor());      using (var sw = new stringwriter())     {             var viewresult = _razorviewengine.findview(actioncontext, viewname, false);          if (viewresult.view == null)         {             throw new argumentnullexception($"{viewname} not match available view");         }          var viewdictionary = new viewdatadictionary(new emptymodelmetadataprovider(), new modelstatedictionary())         {             model = model         };          var viewcontext = new viewcontext(             actioncontext,             viewresult.view,             viewdictionary,             new tempdatadictionary(actioncontext.httpcontext, _tempdataprovider),             sw,             new htmlhelperoptions()         );          await viewresult.view.renderasync(viewcontext);         return sw.tostring();     } } 

my application not use web functionality if understanding correctly able use if web functionality disabled still need have webhostbuilder configured specify services di etc?

am correct assumption or there approach use?