Addition and Product of Two Numbers in C# Windows Form

 In this tutorial I will show you how to write a program that will ask the user to give two numbers and then it will compute the addition and product of two  numbers using C# windows form.

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Program Listing

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace WindowsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            int first,second;

            int add,product;

            first = Convert.ToInt32(textBox1.Text);

            second = Convert.ToInt32(textBox2.Text);

            add = first + second;

            product = first * second;

            textBox3.Text = (add.ToString());

            textBox4.Text = (product.ToString());

        }

        private void button3_Click(object sender, EventArgs e)

        {

            this.Close();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            textBox1.Text = "";

            textBox2.Text = "";

            textBox3.Text = "";

            textBox4.Text = "";

            textBox1.Focus();

        }

    }

}