private void btnBrowse_Click(object sender, System.EventArgs e) 
    {	
            odlgAttachment.InitialDirectory = @"C:\";
            odlgAttachment.Filter = "All Files (*.*)|*.*|HTML Files (*.htm;*.html)|*.htm|Microsoft Mail Documents (*.msg)|*.msg|Word Documents (*.doc)|*.doc|Excel Files(*.xl*)|*.xl*|Excel Worksheets (*.xls)|*.xls|Excel Charts (*.xlc)|*.xlc|PowerPoint Presentations (*.ppt)|*.ppt|Text Files (*.txt)|*.txt";
            odlgAttachment.FilterIndex = 1;
            // The OpenFileDialog control only has an Open button, not an OK button.
            // However, there is no DialogResult.Open enum so use DialogResult.OK.
            if (odlgAttachment.ShowDialog() == DialogResult.OK) {
                if (arlAttachments == null) {
                    arlAttachments = new ArrayList();
                    // Clear the "(No Attachments)" default text in the ListView
                    lstAttachments.Items.Clear();
                }
                arlAttachments.Add(new MailAttachment(odlgAttachment.FileName));
                // You only want to show the file name. The OpenFileDialog.FileName
                // property contains the full path. So Split the path and reverse it
                // to grab the first string in the array, which is just the FileName.
                string[] strFileName= odlgAttachment.FileName.Split(Convert.ToChar(@"\"));
				Array.Reverse(strFileName);
                //all files are added to textbox 
                lstAttachments.Items.Add(strFileName[0]);
            }       
    }