C#做登陆器，为能实现，求帮助...

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;
using System.IO;
using System.IO.Compression; 
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;namespace Server
{
    [Serializable]
    public partial class Form1 : Form
    {
   
        public Form1()
        {
            InitializeComponent();
            
        }
        //创建DBHelper对象
        DBHelper dbh = new DBHelper();        //点击登陆
        private void button1_Click(object sender, EventArgs e)
        {
                        string sql = string.Format("select count(*) from [T_DepartManager] where [ID] = '{0}' and [password] = '{1}'", txtName.Text, txtPwd.Text);
            int res = (int)dbh.DataScalar(sql);
            if (res > 0)
            {
                //Form1.DeSerialize();
                Form1.toBin();
           
                MessageBox.Show("登陆成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);            
            }
            else
            {
                MessageBox.Show("登陆失败！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                this.txtPwd.Clear();
            }
        }
        //点击取消
        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        private void linkLabel1_LinkClicked_1(object sender, LinkLabelLinkClickedEventArgs e)
        {
            System.Diagnostics.Process.Start("http://www.baidu.com");
        
        }
        public static void toBin()
        {
            Form1 name = new Form1();
            
            using (FileStream fs = new FileStream("c:\\name.txt", FileMode.Create))
            {
                BinaryFormatter bf = new BinaryFormatter();
                bf.Serialize(fs,name.txtName.Text);            }
        }
        public static void DeSerialize()
        {            using (FileStream fileStream = new FileStream("c:\\name.dat", FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                BinaryFormatter b = new BinaryFormatter();
                Form1 name = new Form1();
                name = b.Deserialize(fileStream)as Form1;
                Console.WriteLine(name.txtName.Text);
                fileStream.Close();
            }
        }  
    }
}