Not getting previous value of List in itemUpdated event receiver

Question

 I have scenario that if i update any item in a listA(in sitecollection1) it should update in another listB(sitecollection2)..
I am using beforeproperties it is throwing null value..
 but i need that previous value of listA which i have updated just now in "itemupdated" event receiver
here is my code
 public override void ItemUpdated(SPItemEventProperties properties)
            base.ItemUpdated(properties);
            using (SPWeb web = new SPSite("http://natex2:1990/sites/ess/facilities/spaces").OpenWeb())
                web.AllowUnsafeUpdates = true;
                SPList list = web.Lists.TryGetList("LocationDetails");
                 //string querry = properties.ListItem["Title"].ToString();
                 string querry = properties.BeforeProperties["Title"].ToString();
                SPQuery qury = new SPQuery();
                qury.Query = "<Where><Eq>" +
                    "<FieldRef Name='Title' />" +
                   "<Value Type='Text'>" + querry + "</Value>" +
                  "</Eq>" +
                  "</Where>";
                SPListItemCollection coll = list.GetItems(qury);
                foreach (SPListItem item in coll)
                    string data = properties.AfterProperties["Title"].ToString();
                    item["Title"] = data;
                    list.Update();
                web.AllowUnsafeUpdates = false;
please anybody help me i need urgent help

Answer 1

Are you working with a list or a library? In a list, you will need to handle the synchronous (ItemUpdating) event instead of the asynchronous (ItemUpdated) event in order to access the original value...but there's a catch!
As per the table in
this post, the BeforeProperties hashtable is not populated for list items. You can, however, access the original value using
properties.ListItem (the line you have commented out above) in the
ItemUpdating event.
Confusing, I know...but hopefully that helps!
Danny Jessee
MCPD - SharePoint Developer 2010
MCTS - SharePoint 2010, Configuring
dannyjessee.com/blog