Get an image of the body of an email, write to the database or in memory and show it in a new Viewer

I'm trying to build an E-mail viewer.

To do this, I access my IMAP server and get mail, using the ComponentSoft.Net.Mail DLL.

After getting the message, I want to display it in my viewer.

However, I'm having problems with the Linked resources, this is because I do not want to save them physically but only save to MemoryStream or Byte array in the DB.

The problem is getting the image of any of these sites, because I want to put it back as a CID in the Body of the email, so that my viewer can present it. However I am not able to get this CID.

What to do?

For better understanding I put the code I'm using:

 Dim img As Drawing.Image = Drawing.Image.FromStream(email.LinkedResources(i).GetContentStream)
 Dim converter As New Drawing.ImageConverter
 Dim byteImage As Byte() = converter.ConvertTo(img, GetType(Byte()))
 Dim base64 As String = System.Convert.ToBase64String(byteImage)
 Dim LR As String = "cid:" + email.LinkedResources(i).ContentIdentifier
 If MailBody.Contains(LR) Then
     MailBody = Replace(MailBody, LR, "<img src=data:image/gif;base64," + base64)
 End If