public JsonResult DelitSlide(int numSlide, int count)
{
var mng = new Pptx();
var sm = new SettingsManager();
mng.SetFolder(sm.GetSetting("folder_presentation", ""));
bool newSlide = mng.DeleteSlide(numSlide, count);
return(new JsonResult
{
Data = newSlide,
JsonRequestBehavior = JsonRequestBehavior.AllowGet
});
}