Delete

public void Delete(int index)

Document doc = new Document("input.pdf");
OperatorCollection oc = doc.Pages[1].Contents;
oc.Delete(3);

public void Delete(Operator[] ops)

Document doc = new Document("input.pdf");
OperatorCollection oc = doc.Pages[1].Contents;
oc.Delete(new Operator[] { oc[1] } );

public void Delete(IList<Operator> list)

Document doc = new Document("input.pdf");
OperatorCollection oc = doc.Pages[1].Contents;
List<Operator> opList = new List<Operator>();
opList.Add(oc[1]);
oc.Delete(opList);