Program.cs

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            
            
                Console.SetCursorPosition(40, 0);
                {
                    Console.WriteLine("you can find me wuth this email      armynparsa789@gmail.com");
                    Console.WriteLine("you can do these things in this calculater (+ , - , / , *) but this code is updating");
                }
                Console.ForegroundColor = ConsoleColor.red;
                Console.WriteLine("write first number + second number and for third number read information under this sentense");
                int p = 0;
                int o = 10;
                Console.WriteLine("NUMBER 1 FOR +");
                Console.WriteLine("NUMBER 2 FOR -");
                Console.WriteLine("NUMBER 3 FOR *");
                Console.WriteLine("NUMBER 4 FOR /");
            label1:
            try
            { 
                
                while (p < o)
                {

                    int f = int.Parse(Console.ReadLine());
                    int w = int.Parse(Console.ReadLine()); ;
                    int x = int.Parse(Console.ReadLine());
                    if (x == 1)
                    {
                        Console.WriteLine(f + w);
                    }
                    if (x == 2)
                    {
                        Console.WriteLine(f - w);
                    }
                    if (x == 3)
                    {
                        Console.WriteLine(f * w);
                    }
                    if (x == 4)
                    {
                        Console.WriteLine(f / w);
                    }
                    p += 1;
                    Console.ReadKey();
                    Console.Clear();
                } 
                }
            catch (Exception)
            {
                Console.WriteLine("you should wright number.");
                goto label1;
                Console.ReadKey();
                throw;
            }
            
            }
            
               
        }
    }