How to accept values into array using Textbox and display th

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 WindowsFormsApplication8 { public partial class Form2 : Form { int[] n1 = new int[3]; public Form2() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { int value; if (int.TryParse(textBox1.Text, out value)) n1[0] = value; if (int.TryParse(textBox2.Text, out value)) n1[1] = value; if (int.TryParse(textBox3.Text, out value)) n1[2] = value; textBox4.Text = n1.Sum().ToString(); } } }