c# - How to Serialize a ListItem Stored in Session -

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I have this code that works fine on my local server: 

  if (Page. IsPostBack) {string [] Question = New string [20]; String [] answer = new string [20]; For (int i = 0; i & lt; lstQuestions.Items.Count; ++ i) {question [i] = lstQuestions.Items [i] Text; Answer [i] = lstQuestions.Items [i]. value; } Session ["question"] = question; Session ["answer"] = answer; If (session ["qalist"] == zero) {list & lt; ListItem & gt; Qalist = lstQuestions.Items.Cast & lt; ListItem & gt; (). ToList (); Session ["qalist"] = qalist; } And {list & lt; ListItem & gt; Qalist = (list & lt; ListItem & gt;) session ["qalist"]; LstQuestions.DataSource = qalist; }} And {if (session ["question"] = null & session ["answer"]! = Null and session ["checklist"] = null] {list  catalogs> Qalist = (list   
 However, when I go to a web server, I get the "System.Web.UI.WebControls.ListItem" error, which has not been said to be serializable. Is how can I make this serial, or even How can that "qalist" change as a value, which is really serial, and then saves that value to that session? However, my efforts were of no use, serializing the best route? Looking for a different way of storing data? Or something else?   
 
 
  UI.WebControls.ListItem  is not serial, as you have seen, so you can not store it in session Are there.  
 I'm a little confused that you are  ListItem  -  why two data properties are being saved  and  answers  - In individual sessions, and also  ListItem  itself I think that, with the  question  and  answering , you only need to rebuild  ListItem .  
 But if you want to save your question and want to answer together as a pair, then you  list  of  system.Tuple & lt; String, string & gt; , which is serialable, or even  System.Web.UI.Pair , which is the serialjase.  
 You can also write your own (very simple) category, and mark it as serialjage:  
  [serialable] public class questions and Enter {public string question {get; Set;} public string reply {get; Set; }}

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