Miniszámológép

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            bool ell;
            double a, b;
            char note;
            Muvelet ActualMuvelet = new Muvelet();

            do {
                Console.WriteLine("Kérem az első számot:");
                ell = double.TryParse(Console.ReadLine(), out a);
            } while( !ell );

            ActualMuvelet.X = a;

            do
            {
                Console.WriteLine("Kérem a műveleti jelet:");
                ConsoleKeyInfo Szvatopluk = new ConsoleKeyInfo();
                Szvatopluk = Console.ReadKey();
                note = Szvatopluk.KeyChar;
                Console.WriteLine();

            } while (!(note == '+' || note == '-' || note == '*' || note == '/'));

            ActualMuvelet.Muv = note;

            do
            {
                Console.WriteLine("Kérem a második számot:");
                ell = double.TryParse(Console.ReadLine(), out b);
            } while (!ell || (b==0 && note =='/'));

            ActualMuvelet.Y = b;

            ActualMuvelet.Szamol();
            Console.WriteLine("Az eredmeny: " + ActualMuvelet.Eredmeny);
        }
    }
    class Muvelet
        {
        private double x;
        private double y;
        private double eredmeny;
        private char muv;

            public double Eredmeny{
                set { this.eredmeny = value; }
                get { return eredmeny; }
            }

            public double X
            {
                set { this.x = value; }
                get { return x; }
            }

            public double Y
            {
                set { this.y = value; }
                get { return y; }
            }

            public char Muv
            {
                set { this.muv = value; }
                get { return muv; }
            }

            public void Szamol(){
                switch(muv){
                    case '+':
                        eredmeny = X + Y;
                        break;
                    case '-':
                        eredmeny = X - Y;
                        break;
                    case '*':
                        eredmeny = X * Y;
                        break;
                    case '/':
                        eredmeny = X / Y;
                        break;
                }
            }

        }
    }