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Home/ Questions/Q 692099
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Editorial Team
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Editorial Team
Asked: May 14, 20262026-05-14T02:36:56+00:00 2026-05-14T02:36:56+00:00

I need to build up a List<object> and cache the list and be able

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I need to build up a List<object> and cache the list and be able to append to it. I also need to be able to blow it away easily and recreate it. What is a simple way to accomplish this?

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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-05-14T02:36:56+00:00Added an answer on May 14, 2026 at 2:36 am

    Something like this perhaps?

    using System;
    using System.Collections.Generic;
    using System.Web;
    
    public class MyListCache
    {
        private List<object> _MyList = null;
        public List<object> MyList {
            get {
                if (_MyList == null) {
                    _MyList = (HttpContext.Current.Cache["MyList"] as List<object>);
                    if (_MyList == null) {
                        _MyList = new List<object>();
                        HttpContext.Current.Cache.Insert("MyList", _MyList);
                    }
                }
                return _MyList;
            }
            set {
                HttpContext.Current.Cache.Insert("MyList", _MyList);
            }
        }
    
        public void ClearList() {
            HttpContext.Current.Cache.Remove("MyList");
        }
    }
    

    As for how to use…..

    // Get an instance
    var listCache = new MyListCache();
    
    // Add something
    listCache.MyList.Add(someObject);
    
    // Enumerate
    foreach(var o in listCache.MyList) {
      Console.WriteLine(o.ToString());
    }  
    
    // Blow it away
    listCache.ClearList();
    
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