What is the difference between SessionState and ViewState in c#?

There are the following differences between the session state and ViewState.

• Session state is saved on the server, ViewState is saved in the page.
• An important point that the ViewState travels up and down between client and server, but SessionState stays on the server.
• Session state is usually cleared after a period of inactivity from the user (no request happened containing the session id in the request cookies).
• The view state is posted on subsequent posts back in a hidden field.