​

namespace Rational

{ 

  class Program

 {

  static void Main(string[] args)

    {

    }

 } 

public class Rational

{ 

    //член данни

    private int numer;

    private int denom;

    //свойства

    public int Numer

    {

       set

        {

          this.numer = value;

        }

       get

        { 

         return this.numer;

        }

    }

    public int Denom

    {

       set

        {

          if(value == 0) this.denom = 1;

          else this.denom = value;

        }

       get

        {

          return this.denom;

        }

    }

    //конструктор

    //методи

public Rational Add(Rational r)

  {

  Rational result = new Rational();

  result.numer = this.numer*r.denom+this.denom*r.numer;

  result.denom = this.denom*r.denom;

  return result;

  }

 }

}