BEurtle.IssueDetail.SaveAsFile C# (CSharp) Метод

        private void SaveAsFile(Stream s)
        {
            XPathNavigator comment = commentToUUID.ContainsKey(Comments.SelectedNode) ? commentToUUID[Comments.SelectedNode].Item2 : null;
            if (comment == null) throw new Exception("Comment not found");
            var commentbody = comment.SelectSingleNode("body").ToString();
            var commenttype = comment.SelectSingleNode("content-type").ToString();
            if (commenttype.StartsWith("text/"))
            {
                byte[] towrite = Encoding.UTF8.GetBytes(commentbody);
                s.Write(towrite, 0, towrite.Length);
            }
            else
            {
                byte[] towrite = Convert.FromBase64String(commentbody);
                s.Write(towrite, 0, towrite.Length);
            }
        }

 public TemporarySaveFile(IssueDetail form)
 {
     uuid_xpath comment = form.commentToUUID.ContainsKey(form.Comments.SelectedNode) ? form.commentToUUID[form.Comments.SelectedNode] : null;
     var ext = MIMETypesDictionary.ContainsKey(form.DraggableIcon.Items[0].Text) ? MIMETypesDictionary[form.DraggableIcon.Items[0].Text] : "bin";
     string tempfilepath = Path.GetTempPath() + "BEurtle";
     tempfilename = tempfilepath + @"\comment-" + (comment!=null ? comment.Item1.ToString() : "new") + "." + ext;
     if (!Directory.Exists(tempfilepath)) Directory.CreateDirectory(tempfilepath);
     data = new FileStream(tempfilename, FileMode.Create, FileAccess.ReadWrite, FileShare.Delete | FileShare.ReadWrite);
     form.SaveAsFile(data);
     data.Seek(0, SeekOrigin.Begin);
 }