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 button2_Click(object sender, EventArgs e)
        {
            if (textBox1.Text.Contains("@") && (textBox1.Text.Contains(".com") || textBox1.Text.Contains (".ro")))
                label1.Text="VALID";
            else label1.Text ="INVALID";
        }
         krivate void button1_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}