How can I reject all changes in a Linq to SQL's DataContext?

Question

On Linq to SQL\'s DataContext I am able to call SubmitChanges() to submit all changes.

What I want is to somehow reject all changes in the datacontext and rollback a

Answer 1

public static class DataContextExtensions
{
    /// 

    ///     Discard all pending changes of current DataContext.
    ///     All un-submitted changes, including insert/delete/modify will lost.
    /// 
    /// 
    public static void DiscardPendingChanges(this DataContext context)
    {
        context.RefreshPendingChanges(RefreshMode.OverwriteCurrentValues);
        ChangeSet changeSet = context.GetChangeSet();
        if (changeSet != null)
        {
            //Undo inserts
            foreach (object objToInsert in changeSet.Inserts)
            {
                context.GetTable(objToInsert.GetType()).DeleteOnSubmit(objToInsert);
            }
            //Undo deletes
            foreach (object objToDelete in changeSet.Deletes)
            {
                context.GetTable(objToDelete.GetType()).InsertOnSubmit(objToDelete);
            }
        }
    }

    /// 

    ///     Refreshes all pending Delete/Update entity objects of current DataContext according to the specified mode.
    ///     Nothing will do on Pending Insert entity objects.
    /// 
    /// 
    /// A value that specifies how optimistic concurrency conflicts are handled.
    public static void RefreshPendingChanges(this DataContext context, RefreshMode refreshMode)
    {
        ChangeSet changeSet = context.GetChangeSet();
        if (changeSet != null)
        {
            context.Refresh(refreshMode, changeSet.Deletes);
            context.Refresh(refreshMode, changeSet.Updates);
        }
    }
}

Refer to Linq to SQL - Discard Pending Changes