i got the error like this while attach the file to send a mail

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ASP.NET

i got the error like this while attach the file to send a mail but without attachment the message has been send (if i hide attach comment)
the error like this:
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System.IO.FileNotFoundException: Could not find file 'C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\free-photo-background-952-m.jpg'. File name: 'C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\free-photo-background-952-m.jpg' at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share) at System.Net.Mail.AttachmentBase.SetContentFromFile(String fileName, String mediaType) at System.Net.Mail.AttachmentBase..ctor(String fileName) at System.Net.Mail.Attachment..ctor(String fileName) at customerdetails.SendEmail(String toAddress, String ccAddress, String bccAddress, String subject, String body, MailPriority priority, Boolean isHtml) in e:\E-mobileshop\admin\customerdetails.aspx.cs:line 275

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and i use this code :

protected void SendEmailWithAttachment(object sender, EventArgs e)
    {
        SendEmail(txtTo.Text.Trim(), "", "", txtSubject.Text.Trim(), txtBody.Text.Trim(),System.Net.Mail.MailPriority.High, false);
    }
    private void SendEmail(string toAddress, string ccAddress, string bccAddress, string subject, string body,  System.Net.Mail.MailPriority priority, bool isHtml)
    {
        body = txtBody.Text.ToString();
        subject = txtSubject.Text.ToString();
        toAddress = txtTo.Text.ToString();
        try
      {
            
            SmtpClient smtpClient = new SmtpClient();
            System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();
               
                    MailAddress fromAddress = new MailAddress("ramji.kid@gmail.com", "ramji.kid, gmail.Com");

                    // You can specify the host name or ipaddress of your server
                    smtpClient.Host = "smtp.gmail.com"; //you can also specify mail server IP address here
                    smtpClient.EnableSsl = true;
                    //Default port will be 25
                    smtpClient.Port = 25;

                    NetworkCredential info = new NetworkCredential("ramji.kid@gmail.com", "hi");
                    smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
                    smtpClient.UseDefaultCredentials = false;
                    smtpClient.Credentials = info;

                    //From address will be given as a MailAddress Object
                    message.From = fromAddress;
                    message.Priority = priority;

                    // To address collection of MailAddress
                    message.To.Add(toAddress);
                    message.Subject = subject;
                    if (ccAddress.Length > 0)
                    {
                        message.CC.Add(ccAddress);
                    }
                    if (bccAddress.Length > 0)
                    {
                        message.Bcc.Add(bccAddress);
                    }

                    //Body can be Html or text format
                    //Specify true if it is html message
                    message.IsBodyHtml = isHtml;

                    // Message body content
                    message.Body = body;

                     //Add the attachment, if any
                   if (FileUpload1.PostedFile.ContentLength > 0)
                    {
                        Attachment attachment = new Attachment(Path.GetFullPath(FileUpload1.PostedFile.FileName));
                        message.Attachments.Add(attachment);
                    }

                    // Send SMTP mail
                    smtpClient.Send(message);

                    lblMessage.Text = "Email sent to " + toAddress + " successfully !";
               
            
        }
        catch (Exception ee)
        {
            lblMessage.Text = ee.ToString();
        }
    }