Difference Between ViewBag & ViewData in MVC

This blog defines the difference between ViewBag & ViewData in MVC.

ViewBag vs ViewData in MVC ? Difference between ViewBag & ViewData?

1. ViewData is a dictionary of objects that is derived from ViewDataDictionary class and accessible using strings as keys.
2. ViewBag is a dynamic property that takes advantage of the new dynamic features in C# 4.0.
3. ViewData requires typecasting for complex data type and check for null values to avoid error.
4. ViewBag doesn't require typecasting for complex data type.
5. Calling of ViewBag is :

   ViewBag.Name = "Yogesh";

   Calling of ViewData is :

   ViewData["Name"] = "yogesh";