Attachment.cs

using System;
using System.ComponentModel;

namespace AE.Net.Mail {
    public class Attachment : ObjectWHeaders {
        public string Filename {
            get { return Headers["Content-Disposition"]["filename"]; }
        }

        [Obsolete("Use ContentTransferEncoding instead"), EditorBrowsable(EditorBrowsableState.Never)]
        public string ContentEncoding { get { return ContentTransferEncoding; } set { ContentTransferEncoding = value; } }

        [Obsolete("Use Body instead"), EditorBrowsable(EditorBrowsableState.Never)]
        public string Content { get { return Body; } set { SetBody(value); } }

        [Obsolete("Use GetData instead"), EditorBrowsable(EditorBrowsableState.Never)]
        public byte[] GetContent() { return GetData(); }

        private string _ContentDisposition;
        private string ContentDisposition {
            get { return _ContentDisposition ?? (_ContentDisposition = Headers["Content-Disposition"].Value.ToLower()); }
        }

        public bool OnServer { get; internal set; }

        public bool IsAttachment {
            get {
                return ContentDisposition == "attachment" || ContentDisposition == "inline";
            }
        }

        public void Save(string filename) {
            using (var file = new System.IO.FileStream(filename, System.IO.FileMode.Create))
                Save(file);
        }

        public void Save(System.IO.Stream stream) {
            var data = GetData();
            stream.Write(data, 0, data.Length);
        }

        public byte[] GetData() {
            byte[] data;
            if (ContentTransferEncoding.Is("base64") && Utilities.IsValidBase64String(Body)) {
                try {
                    data = Convert.FromBase64String(Body);
                } catch (Exception) {
                    data = System.Text.Encoding.UTF8.GetBytes(Body);
                }
            } else {
                data = System.Text.Encoding.UTF8.GetBytes(Body);
            }
            return data;
        }

    }
}