Arithmetic Operations on two numbers

Adding, subtraction, multiplication and division of two numbers with the help of two TextBoxes and result will display in third TextBox by using window form.

Step 1: Open visual studio--> file menu-->new--> project--> then

Step 2: Take 3 TextBoxes one for input First number, other for second number and third one is for the result TextBox. Design the form as follows:

Step 3: Coding

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;

namespace Arithmetic
{
public partial class ArthOperations : Form
{
public ArthOperations()
{
InitializeComponent();
textBox3.Enabled = false;
}
private void add(object sender, EventArgs e)
{
float first;
float second;
float output;
first = Convert.ToInt32(textBox1.Text);
second = Convert.ToInt32(textBox2.Text);
output = first + second;
textBox3.Text=(output.ToString());
}

private void sub(object sender, EventArgs e)
{
float first;
float second;
float output;
first = Convert.ToInt32(textBox1.Text);
second = Convert.ToInt32(textBox2.Text);
output = first - second;
textBox3.Text = (output.ToString());
}