Retrieving values from view state

How can we retrieve value of a sever control from viewstate?

For example if we want to retrieve value of text in t开发者_StackOverflowexbox server control.

first you have to store the value of text box in the viewstate

viewstate["tboxValue"] = tbox.text;

and now suppose you want to retrieve it in label

lblValue.text = viewstate["tboxValue"].ToString();