public int next(int n) {if (n < 0) {for (int i = 0; i < -n; i++) {previous();}} else {for (int i = 0; i < n; i++) {next();}}return current();}
public override int Next(int n){if (n < 0){for (int i = 0; i < -n; i++){Previous();}}else{for (int i = 0; i < n; i++){Next();}}return Current;}