BEurtle.IssueDetail.LoadFromFile C# (CSharp) Méthode

        private void LoadFromFile(Stream s)
        {
            byte[] buffer = new byte[s.Length];
            s.Read(buffer, 0, buffer.Length);
            UInt32 mimetype_;
            FindMimeFromData(0, null, buffer, 256, null, 0, out mimetype_, 0);
            IntPtr mimetypeptr = new IntPtr(mimetype_);
            string mimetype = Marshal.PtrToStringUni(mimetypeptr);
            Marshal.FreeCoTaskMem(mimetypeptr);
            if (mimetype.StartsWith("text/"))
            {
                var textreader = new StreamReader(new MemoryStream(buffer));
                var text = textreader.ReadToEnd();
                if (mimetype == "text/plain") text = fixUp(text);
                CommentBodyRaw.Text = CommentBody.Document.Body.InnerHtml = text;
            }
            else
            {
                var text = Convert.ToBase64String(buffer);
                CommentBodyRaw.Text = CommentBody.Document.Body.InnerHtml = text;
            }
            DraggableIcon.Items[0].Text = mimetype;
            DraggableIcon.Items[0].ImageIndex = 0;
            if (mimetype.StartsWith("image/"))
                DraggableIcon.Items[0].ImageIndex = 1;
            else if (mimetype.StartsWith("application/zip"))
                DraggableIcon.Items[0].ImageIndex = 2;
        }