Area of Rectangle in C#

Here is a another simple program that I wrote in C# to ask the user to give the length and breath of the rectangle and the our program will compute for its area. I am using Visual Studio 2010 Ultimate Edition in this program.

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Sample Program Output

Program Listing

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 WindowsFormsApplication2

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            int length= 0, breadth=0,solve_area=0;

            if (!int.TryParse(textBox1.Text, out length))

            {

                MessageBox.Show("I need just a number in the textbox.");

                textBox1.Text = "";

                textBox2.Text = "";

                textBox1.Focus();

            }

            else  if (!int.TryParse(textBox2.Text, out breadth))

            {

                MessageBox.Show("I need just a number in the textbox.");

                textBox1.Text = "";

                textBox2.Text = "";

                textBox1.Focus();

            }

            else

            {

                length = Convert.ToInt32(textBox1.Text);

                breadth = Convert.ToInt32(textBox2.Text);

                solve_area = (length * breadth);

                label5.Text = "The Area of the Rectangle is " + solve_area + ".";

            }

        }

        private void button2_Click(object sender, EventArgs e)

        {

            textBox1.Text = "";

            textBox2.Text = "";

            label5.Text = " ";

            textBox1.Focus();

        }

    }

}