Computer Science Engineering Program: A windows application to authenticate a user and password

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.Data.SqlClient;
namespace WindowsFormsApplication3
{
    public partial class Form1 : Form
    {
        SqlConnection con = new SqlConnection("Data source= HP-PC\\SQLEXPRESS;Initial Catalog=Login_data;Integrated Security=True;");
        public Form1() {
                    InitializeComponent(); }
                private void button1_Click(object sender, EventArgs e) {
            try {
                            String s;
                con.Open();
                SqlCommand com = new SqlCommand("select *from Login_info where U_name=@User_name AND U_password = @Password", con);
                com.Parameters.AddWithValue("@User_name", textBox1.Text);
                com.Parameters.AddWithValue("@Password", textBox2.Text);
                SqlDataReader rd = com.ExecuteReader();
                if (rd.Read())
                {
                    s = rd.GetString(0);
                    MessageBox.Show("Welcome" + textBox1.Text, "Welcome", MessageBoxButtons.OK, MessageBoxIcon.Asterisk); }
                                else {
MessageBox.Show("incorrect Username or password \n please enter correct username and password.", "Login failed", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);

                }
                con.Close();
            }
            catch {
                MessageBox.Show("Database connection failure", "error",
                    MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }}}}


    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Windows.Forms;
    namespace WindowsFormsApplication3
    {
        static class Program
        {
            static void main()
        {
                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);
                Application.Run(new Form1());
            }}}
namespace WindowsFormsApplication3

    partial class Form1
    {
        private System.ComponentModel.IContainer components =null;
        protected override void Dispose(bool disposing)
        {
        if(disposing && (components !=null))
        {
        components.Dispose();
        }
            base.Dispose(disposing);
        }
        private void InitializeComponent()
        {
            this.textBox1=new System.Windows.Forms.TextBox();
            this.textBox2=new System.Windows.Forms.TextBox();
            this.button1=new System.Windows.Forms.Button();
            this.label1=new System.Windows.Forms.Label();
            this.label2=new System.Windows.Forms.Label();
            this.SuspendLayout();
            this.textBox1.Location=new System.Drawing.Point(95,23);
            this.textBox1.Name="textBox1";
            this.textBox1.Size=new System.Drawing.Size(311,20);
            this.textBox1.TabIndex=0;
            this.textBox2.Location=new System.Drawing.Point(95,64);
            this.textBox2.Name="textBox2";
            this.textBox2.Size=new System.Drawing.Size(311,20);
            this.textBox2.TabIndex=1;
            this.button1.Location=new System.Drawing.Point(313,90);
            this.button1.Name="button1";
            this.button1.Size=new System.Drawing.Size(81,23);
            this.button1.TabIndex=2;
            this.button1.Text="Login>>";
            this.button1.UseVisualStyleBackColor=true;
            this.button1.Click +=new System.EventHandler(button1_Click);
            this.label1.AutoSize=true;
            this.label1.Location=new System.Drawing.Point(23,26);
            this.label1.Name="label1";
            this.label1.Size=new System.Drawing.Size(56,13);
            this.label1.TabIndex=4;
            this.label1.Text="Password";
            this.AutoScaleDimensions= new System.Drawing.SizeF(6F,13F);
            this.AutoScaleMode=System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize=new System.Drawing.Size(428,121);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.button1);
            this.Name="Form1";
            this.Text="Form1";
            this.ResumeLayout(false);
            this.PerformLayout();
    }
    private System.Windows.Forms.TextBox textBox1;
    private System.Windows.Forms.TextBox textBox2;
    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.Label label2;
      }
}