//----< VisitParallelForOperationElement >------------------------------
public override void VisitParallelForOperationElement(ParallelForOperationElement element)
{
Console.WriteLine("VisitParallelFor ...");
}
public abstract void VisitParallelForOperationElement(ParallelForOperationElement element);
//----< visit a Parallel For Operation >------------------------------
public override void VisitParallelForOperationElement(ParallelForOperationElement element)
{
Console.WriteLine("VisitParallelFor");
//dele("VisitParallelFor");
element.ParallelRun();
}