Hi
Thank you for your response.
I solve my problem with below code:
First creat a message object from OpenPOP.Mime.Message:
string StringRawContent = System.Text.ASCIIEncoding.ASCII.GetString(DB.RawMessage.ToArray());
OpenPOP.MIME.Message raw = new OpenPOP.MIME.Message(true, StringRawContent, false);
Now we have all parts of email such as Subject, Body, Sender, Attachments and etc in raw object.
For example i get first attachment file via below code:
if (raw.Attachments.Count > 0)
AttachmentFileContent = (from a in raw.Attachments.First().RawContent
select (byte)a).ToArray();