Disco.Services.AttachmentActionExtensions.CreateAttachment C# (CSharp) Method

        public static DeviceAttachment CreateAttachment(this Device Device, DiscoDataContext Database, User CreatorUser, string Filename, string MimeType, string Comments, Stream Content, DocumentTemplate DocumentTemplate = null, Image PdfThumbnail = null)
        {
            if (string.IsNullOrEmpty(MimeType) || MimeType.Equals("unknown/unknown", StringComparison.OrdinalIgnoreCase))
                MimeType = Interop.MimeTypes.ResolveMimeType(Filename);

            DeviceAttachment da = new DeviceAttachment()
            {
                DeviceSerialNumber = Device.SerialNumber,
                TechUserId = CreatorUser.UserId,
                Filename = Filename,
                MimeType = MimeType,
                Timestamp = DateTime.Now,
                Comments = Comments
            };

            if (DocumentTemplate != null)
                da.DocumentTemplateId = DocumentTemplate.Id;

            Database.DeviceAttachments.Add(da);
            Database.SaveChanges();

            da.SaveAttachment(Database, Content);
            Content.Position = 0;
            if (PdfThumbnail == null)
                da.GenerateThumbnail(Database, Content);
            else
                da.SaveThumbnailAttachment(Database, PdfThumbnail);

            return da;
        }