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How to update List Items with LINQ?

Posted By:      Posted Date: September 15, 2010    Points: 0   Category :SharePoint
In the code below, the For Each will loop through the list and populate the ListBox.  When I add "item.LeadTime = 5" to try updating an item, Visual Studio says that it is ReadOnly.  Any ideas on what's wrong or missing from the code? Dim spWebUrl As String = SPContext.Current.Web.Url Dim dc As New MyDataContext(spWebUrl) Dim Asgns = From a In dc.GetList(Of AssignmentsItem)("Assignments") Select a.LeadTime, a.Frequency For Each item In Asgns      ListBox1.Items.Add(item.Frequency)      item.LeadTime = 5      dc.SubmitChanges() Next  

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