Why the object needs to be serialized while storing in view state

Serialization is the process of converting the state of an object into a form that can be persisted or transported. This is necessary because sometimes you want to keep rich instances of classes, but you can only store it in a certain format. Serialization provides a quick way of converting back and forth. View State stores a collection of objects that maintain their state across postbacks. The way that ASP.NET accomplishes this is by outputting a hidden form field named __ViewState to each page it renders. Within the value attribute of that hidden form field contains a set of objects that make up ViewState. If you want a rich object to participate in ViewState, you must mark it as serializable, applying the Serializable attribute to your class.

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