1. Data Passing techniques from a controller to View.
   View Data and View Bag are Data Dictionary objects.
   ViewData: View Data is accessible using string key value and need typecasting.
   ViewBag: Dynamic type property, Doesn’t require typecasting
   TempData: TempData is a dictionary object that is derived from TempDataDictionary class
   TempData is used to pass data from current request to subsequent request
   Session:
   derived from HttpSessionState class
   Session is valid for all requests, not for a single
   redirect

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