C#写的简单的登录界面程序

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)
{
if (textBox1.Text == "abcd" && textBox2.Text == "1234")
System.Diagnostics.Process.Start("www.baidu.com");
else
MessageBox.Show("密码错误","注意:");

}

private void button2_Click(object sender, EventArgs e)
{
MessageBox.Show("是否真的要退出！","提示：",MessageBoxButtons.YesNo,MessageBoxIcon.Warning);
this.Close();

}

}
}