CODE FOR ADDITION IN DOTNET USING C#

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 Add
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int i, j,k;
            int.TryParse(textBox1.Text, out i);
            int.TryParse(textBox2.Text, out j);
            int.TryParse(textBox3.Text, out k);
            int result = i + j + k;
            label1.Text = result.ToString();
        }
    }
}