public partial class FrmImages : Form
    {
        public FrmImages()
        {
            InitializeComponent();
            InitializeOpenFileDialog();
        }
        private void InitializeOpenFileDialog()
        {
            // Set the file dialog to filter for graphics files.
            this.openFileDialog1.Filter =
                "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|" +
                "All files (*.*)|*.*";

            // Allow the user to select multiple images.
            this.openFileDialog1.Multiselect = true;
            this.openFileDialog1.Title = "My Image Browser";
        }

      
        private void btnDownloadSome_Click(object sender, EventArgs e)
        {
            DialogResult dr = this.openFileDialog1.ShowDialog();
            if (dr == System.Windows.Forms.DialogResult.OK)
            {
                // Read the files
                foreach (String file in openFileDialog1.FileNames)
                {
                    // Create a PictureBox.
                    try
                    {
                        PictureBox pb = new PictureBox();
                        Image loadedImage = Image.FromFile(file);
                        pb.Height = flowLayoutPanel1.Height;
                        pb.Width = (int)(flowLayoutPanel1.Height*0.8);
                        pb.Image = loadedImage;
                        pb.SizeMode = PictureBoxSizeMode.StretchImage;
                        flowLayoutPanel1.Controls.Add(pb);
                    }
                    catch (SecurityException ex)
                    {
                        // The user lacks appropriate permissions to read files, discover paths, etc.
                        MessageBox.Show("Security error. Please contact your administrator for details.\n\n" +
                            "Error message: " + ex.Message + "\n\n" +
                            "Details (send to Support):\n\n" + ex.StackTrace
                        );
                    }
                    catch (Exception ex)
                    {
                        // Could not load the image - probably related to Windows file system permissions.
                        MessageBox.Show("Cannot display the image: " + file.Substring(file.LastIndexOf('\\'))
                            + ". You may not have permission to read the file, or " +
                            "it may be corrupt.\n\nReported error: " + ex.Message);
                    }
                }
            }
        }
    }

 List<string> fileNames;
                fileNames = openFileDialog1.FileNames.ToList();
                {
                    try
                    {
                        pictureBox1.Image = Image.FromFile(fileNames[0]);
                        pictureBox2.Image = Image.FromFile(fileNames[1]);
                        pictureBox3.Image = Image.FromFile(fileNames[2]);
                        if (fileNames[3]!=null)
                        pictureBox4.Image = Image.FromFile(fileNames[3]);
                    }
                    catch (SecurityException ex)
                    {
                        // The user lacks appropriate permissions to read files, discover paths, etc.
                        MessageBox.Show("Security error. Please contact your administrator for details.\n\n" +
                            "Error message: " + ex.Message + "\n\n" +
                            "Details (send to Support):\n\n" + ex.StackTrace
                        );
                    }
                    catch (Exception)
                    {
                        // Could not load the image - probably related to Windows file system permissions.
                        MessageBox.Show("Cannot display the image: ");

                    }
                }