How to save attachments?

Question

I am using MailKit/MimeKit 1.2.7 (latest NuGet version).

I have been reading the API documentation and several posts on stackoverflow. But I still wasn't able to successfully save email attachments as a file.

Here is my current code:

var mimePart = (attachment as MimePart);
var memoryStream = new MemoryStream();
mimePart.ContentObject.DecodeTo(attachmentStream);

using (var fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
{
      memoryStream.CopyTo(fileStream);
}

I have been trying this code with different kinds of attachments. The created file on my disc is always empty.

What am I missing?

Answer 1

The problem with the above code is that you are forgetting to reset the memoryStream.Position back to 0 :-)

However, a better way of doing what you want to do is this:

var mimePart = (attachment as MimePart);

using (var fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
{
    mimePart.ContentObject.DecodeTo(fileStream);
}

In other words, there's no need to use a temporary memory stream.