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Using Using Using Using: System System - Collections.Generic System - Linq System - Text

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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace CalculatorLibrary

public class Add

private int x;

private int y;

public Add(int a, int b)

x = a;

y = b;

public int sum()

return x + y;

////////////////////////////////////
using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace CalculatorLibrary

public class Multiplication

private int x;

private int y;

public Multiplication(int a, int b)

x = a;

y = b;

public int Mul()

return x * y;

///////////////////////////////
using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using CalculatorLibrary;

namespace Console_Cal

class Program

static void Main(string[] args)

int x = Convert.ToInt32(Console.ReadLine());

int y = Convert.ToInt32(Console.ReadLine());

int mul_x;

int add_x;

Add add = new Add(x,y);

Multiplication mul = new Multiplication(x,y);

add_x = add.sum();

mul_x= mul.Mul();

Console.WriteLine(add_x);

Console.WriteLine(mul_x);

}
/////////////////////////////

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using CalculatorLibrary;

namespace WindowsForms_cal

public partial class Form1 : Form

public Form1()

InitializeComponent();

private void Form1_Load(object sender, EventArgs e)

private void Btn_Add_Click(object sender, EventArgs e)

int x, y, result;
x = int.Parse(Text_x.Text);

y = int.Parse(Text_y.Text);

Add add = new Add(x,y);

result = add.sum();

Text_result.Text = result.ToString();

/////////////

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