Basic windows form calculator in C# Demo

Below is the program that will perform basic arithmetic operations inn C# using windows form application

Below is the design view of the project.

and here is the source code for the same:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace basic_opr_windows_app_demo1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            int a = Int32.Parse(textBox1.Text);
            int b = Int32.Parse(textBox2.Text);
            int c = a + b;
            textBox3.Text = c.ToString();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            int a = Int32.Parse(textBox1.Text);
            int b = Int32.Parse(textBox2.Text);
            int c = a - b;
            textBox3.Text = c.ToString();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            int a = Int32.Parse(textBox1.Text);
            int b = Int32.Parse(textBox2.Text);
            int c = a * b;
            textBox3.Text = c.ToString();

        }

        private void button4_Click(object sender, EventArgs e)
        {
            int a = Int32.Parse(textBox1.Text);
            int b = Int32.Parse(textBox2.Text);
            int c = a / b;
            textBox3.Text = c.ToString();
        }
    }
}