| sequence/visitor/Sequence.cs - The class IntInterval. | Lecture 8 - slide 36 : 37 Program 3  | 
public class IntInterval: IntSequence{
  private int from, to;
  public IntInterval(int from, int to){
    this.from = from;
    this.to = to;
  }
  public int From{
    get{return from;}
  }
  public int To{
    get{return to;}
  }
  public override int Accept(Visitor v){
    return v.Visit(this);
  } 
}