Send Mail from asp.net.Body message contain text & image not in attachment

img alt="" src="data:image/png;base64,/9j/.................

try
                {
                    MailAddress SendFrom = new MailAddress("sangeetha.rhythm14@gmail.com");
                   MailMessage message = new MailMessage();
                    message.From = SendFrom;
                    if (Txtcc.Text == "")
                    {
                    }
                    else
                    {
                        MailAddress SendCC = new MailAddress(Txtcc.Text);
                        message.CC.Add(SendCC);
                    }
                    if (Txtbcc.Text == "")
                    {

                    }
                    else
                    {
                        
                        MailAddress SendBCC = new MailAddress(Txtbcc.Text);
                        message.Bcc.Add(SendBCC);
                    }

                    message.Subject = txtSubject.Text;

                    message.SubjectEncoding = System.Text.Encoding.UTF8;
                    message.Body = txtBody.Content;
                    message.BodyEncoding = System.Text.Encoding.UTF8;
                     message.BodyEncoding = System.Text.Encoding.UTF8;
               message.IsBodyHtml = true;
                    string toemail = txtTo.Text;
                    string[] multi = toemail.Split(',');
                    foreach (string multiemailid in multi)
                    {
                        message.To.Add(new MailAddress(multiemailid));
                    }
                    if (fuAttachment.HasFile)
                    {
                        string FileName = Path.GetFileName(fuAttachment.PostedFile.FileName);
                        message.Attachments.Add(new Attachment(fuAttachment.PostedFile.InputStream, FileName));
                    }
                    SmtpClient smtp = new SmtpClient("smtp.gmail.com");
                    smtp.Port = 587;
                    smtp.Credentials = new System.Net.NetworkCredential("sangeetha.rhythm14@gmail.com", "password");
                    smtp.EnableSsl = true;
                    smtp.Send(message);
                   }
                catch (Exception ex)
                {
                }
                }