about opening a pdf file in c#

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog open = new OpenFileDialog();
            open.Title = "Open";
            open.Filter = "All Files|*.*";
            try
            {
                if (open.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    axAcroPDF1.LoadFile(open.FileName);
                }
            }
            catch (ArgumentException ex)
            {
            MessageBox.Show(ex.Message.ToString(),"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}

string path = "C:\\Report\\filename.pdf";
FileStream fs;
fs = File.Open(path, FileMode.Open);
byte[] bytBytes = new byte[fs.Length];
fs.Read(bytBytes, 0, Convert.ToInt32(fs.Length));
fs.Close();
Response.ContentType = "application/pdf";
Response.BinaryWrite(bytBytes);
FileInfo fi1 = new FileInfo(path);
fi1.Delete();
Response.Flush();
Response.End();