Adding image inside the Html Body using asp.net

protected void btnSubmit_Click(object sender, EventArgs e)

{

try

{

MailMessage Msg = new MailMessage();

// Sender e-mail address.

Msg.From = new MailAddress(txtUsername.Text);

// Recipient e-mail address.

Msg.To.Add(txtTo.Text);

Msg.Subject = txtSubject.Text;

// File Upload path

String FileName = fileUpload1.PostedFile.FileName;

string mailbody = txtBody.Text + "<br/><img src=cid:companylogo>";

LinkedResource myimage = new LinkedResource(FileName);

// Create HTML view

AlternateView htmlMail = AlternateView.CreateAlternateViewFromString(mailbody, null, "text/html");

// Set ContentId property. Value of ContentId property must be the same as

// the src attribute of image tag in email body. 

myimage.ContentId = "companylogo";

htmlMail.LinkedResources.Add(myimage);

Msg.AlternateViews.Add(htmlMail);

// your remote SMTP server IP.

SmtpClient smtp = new SmtpClient();

smtp.Host = "smtp.gmail.com";

smtp.Port = 587;

smtp.Credentials=new System.Net.NetworkCredential(txtUsername.Text,txtpwd.Text);

smtp.EnableSsl = true;

smtp.Send(Msg);

Msg = null;

Page.RegisterStartupScript("UserMsg", "<script>alert('Mail sent thank you...');if(alert){ window.location='SendMail.aspx';}</script>");

}

catch (Exception ex)

{

Console.WriteLine("{0} Exception caught.", ex);

}

}