static private void Inital()
{
List <RequestorBase <T> > RequestList = new List <RequestorBase <T> >();
_startrequestor = new Requestor1 <T>();
var secondrequestor = new Requestor2 <T>();
var thridrequestor = new Requestor3 <T>();
RequestList.Add(_startrequestor);
RequestList.Add(secondrequestor);
RequestList.Add(thridrequestor);
_startrequestor.SetSucessor(secondrequestor);
secondrequestor.SetSucessor(thridrequestor);//requestor3 is the end
}
static private void InsertARequestor(RequestorBase <T> InsertItem, List <RequestorBase <T> > RequestList)
{
RequestList.Insert(RequestList.Count - 1, InsertItem);
InsertItem.SetSucessor(RequestList[RequestList.Count - 1]);
RequestList[RequestList.Count - 3].SetSucessor(InsertItem);
}