I tried following code but it generates error at line (using .....):

Error   23      The type or namespace name 'TransactionScope' could
not be
found (are you missing a using directive or an assembly reference?)

===[CODE]========================================

private void cmdProceed_Click(object sender, EventArgs e)
{
   using (TransactionScope scope = new TransactionScope())
   {
       GenerateAll();

       // Commit the transaction.
       scope.Complete();
   }

}
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