SessionState and ViewState are used to store data value.
View State:
1.View state is maintained in page level only.
2.View state of one page is not visible in another page.
3.View state information stored in client only.
4.View state persist the values of particular page in the client (browser) when post back operation done.
5.View state used to persist page-instance-specific data.
Session State:
1.Session state is maintained in session level.
2.Session state value is available in all pages within a user session.
3.Session state information stored in server.
4.Session state persist the data of particular user in the server. This data available till user close the browser or session time completes.
5.Session state used to persist the user-specific data on the server side.
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