比起深度复制，你***的打赌可能是锁定集合：

Other than doing a deep-copy your best bet might be to lock the collection:

   List<string> theList = (List<String> )callingForm.Invoke(callingForm.delegateGetKillStrings);
    lock(theList.SyncRoot) {
        foreach(string s in theList) {
               // Do some Jazz
        }
    }