using System;
                   
namespace application{
public class m3owgenerator
{
   public static void Main()
   {
       while(true){
       Console.WriteLine("\n Calculator \n Enter the first cat:");
       int a = Convert.ToInt32(Console.ReadLine());
       Console.WriteLine("Enter second cat");
       int b = Convert.ToInt32(Console.ReadLine());
       Console.WriteLine("choose operation\n 1.product\n 2.Subtract\n 3.Addition\n 4.Division");
       int c = Convert.ToInt32(Console.ReadLine());
   
       switch (c){
   
           case 1: String d= Convert.ToString(a*b);
               Console.WriteLine("Product:"+ d);
               break;
           case 2: if(a>b) Console.WriteLine("Difference:"+ Convert.ToString(a-b));
               else     Console.WriteLine("Difference:"+ Convert.ToString(b-a));
               break;
           case 3: Console.WriteLine("Sum:"+ Convert.ToString(a-b));
               break;
           case 4:Console.WriteLine("Division:"+ Convert.ToString(a/b));
               break;
           default :Console.WriteLine("Enter valid option");
               break;
       
       }
       }
       }
   }
}

using System;

using System.Collections.Generic;

using System.Configuration;

using System.Data;

using System.IO;

using System.Linq;

using System.Reflection;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Media;

using Microsoft.Extensions.Configuration;

using Microsoft.Extensions.DependencyInjection;

using Microsoft.Extensions.Hosting;

using MyComputerManager.Models;

using MyComputerManager.Services;

using MyComputerManager.Services.Contracts;

using MyComputerManager.ViewModels;

using MyComputerManager.Views;

using Wpf.Ui.Demo.Models;

using Wpf.Ui.Demo.Services;

using Wpf.Ui.Mvvm.Contracts;

using Wpf.Ui.Mvvm.Services;

namespace MyComputerManager

{

///

/// App.xaml 的交互逻辑

///

public partial class App : Application

{

private IHost _host;

protected override void OnStartup(StartupEventArgs e)

{

base.OnStartup(e);

//Wpf.Ui.Appearance.Accent.Apply(Color.FromRgb(15, 123, 210));

_host = Host.CreateDefaultBuilder(e.Args)

.ConfigureAppConfiguration(c =>

{

c.SetBasePath(Path.GetDirectoryName(Assembly.GetEntryAssembly().Location));

})

.ConfigureServices(ConfigureServices)

.Build();

_host.Start();

}

private void ConfigureServices(HostBuilderContext context, IServiceCollection services)

{

// App Host

services.AddHostedService();

// Theme manipulation

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