how to end and restore session in asp.net c# -

is possible clear values of session on 1 page , restore session on page in asp.net c#? how? clearing session on page1.aspx redirecting page2.aspx , there session should restored. have tried far:

session.abandon() not working

code on first page. session["searchtext] creating problem.

else if (radtabstrip1.selectedindex == 1) {     if (!permissions.checkpermissions(session["employeeloggedin"].tostring(), "acctmodf"))     {         scriptmanager.registerstartupscript(this, page.gettype(), "onload", "alert('you must have accounts: modify permission batch invoice!')", true);     }     else     {         // added shiv on 07/14/2015         session["searchtext"] = null;          fillbatchinvoicegrid(); 

code of second page

if (e.commandname == "alpha" || e.commandname == "nofilter") {      string value = null;     switch (e.commandname)     {         case ("alpha"):         {             value = string.format("{0}", e.commandargument);             break;         }         case ("nofilter"):         {             value = "%";             session["searchduplicate"] = null;             session["searchcussalesrep"] = null;             break;         }     }     // session["searchletter"] = value;     session["searchtype"] = "1";     session["searchtext"] = value;     session["searchfilter"] = "1"; 

i making session[searchtext] = null; on first page thats why on second page, cant access it.

update:

as per op requirement, session[searchtext] should not same when return first page. hence i'm writing below solution resolve issue.

first page:

session["searchtext"] = "something"; 

second page:

session["searchedtext"] = session["searchtext"]; session["searchtext"] = ""; 

old answer:

simple in part, before accessing, check whether null or not.

if(session["searchtext"]!=null) {   //do stuffs }