MimeKit.MimeMessage.GetMimePart C# (CSharp) Метод

		static MimePart GetMimePart (AttachmentBase item)
		{
			var mimeType = item.ContentType.ToString ();
			var contentType = ContentType.Parse (mimeType);
			var attachment = item as Attachment;
			MimePart part;

			if (contentType.MediaType.Equals ("text", StringComparison.OrdinalIgnoreCase))
				part = new TextPart (contentType);
			else
				part = new MimePart (contentType);

			if (attachment != null) {
				var disposition = attachment.ContentDisposition.ToString ();
				part.ContentDisposition = ContentDisposition.Parse (disposition);
			}

			switch (item.TransferEncoding) {
			case System.Net.Mime.TransferEncoding.QuotedPrintable:
				part.ContentTransferEncoding = ContentEncoding.QuotedPrintable;
				break;
			case System.Net.Mime.TransferEncoding.Base64:
				part.ContentTransferEncoding = ContentEncoding.Base64;
				break;
			case System.Net.Mime.TransferEncoding.SevenBit:
				part.ContentTransferEncoding = ContentEncoding.SevenBit;
				break;
			//case System.Net.Mime.TransferEncoding.EightBit:
			//	part.ContentTransferEncoding = ContentEncoding.EightBit;
			//	break;
			}

			if (item.ContentId != null)
				part.ContentId = item.ContentId;

			var stream = new MemoryBlockStream ();
			item.ContentStream.CopyTo (stream);
			stream.Position = 0;

			part.ContentObject = new ContentObject (stream);

			return part;
		}