c# - retain value after page refresh -

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i using button control("validation button") in c#. define global variable in project. when clicked button form validation happens , button("save button") gets visible. problem when click validation button, current page refreshes , global variable doesn't contain values. shows null. how cal maintain value in global variable after page refresh.

this asp.net, correct?
store value in session session["myvariable"] = value , read session value = session["myvaraible"]
there other alternatives, viewstate, application or use static variable using session simple enough you.


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