Commented Issue: Message.Process results in IndexOutOfRangeException [1486]

Dear Coders,

I've just started using your ImapX library to retrieve and read mails from gmail.
Now, everything is working fine and it's a great library.

However, when i'm trying to mark a mail read using the Message.Process() option, it returns the IndexOutOfRangeException.

```
foreach (ImapX.Message message in GmailUser.Instance.Messages.OrderByDescending(w => w.Date))
{
if (SendWebRequest(url))
{
message.Process();
amountRead++;

Dispatcher.BeginInvoke(new MethodInvoker(delegate
{
this.btnRead.Content = "Read [" + amountRead + "/" + GmailUser.Instance.Messages.Count + "]";
}));
}
else
{
failedMessages.Add(message);
}
}
```

Thanks in advance.

Yours Sincerely,
Lars
Comments: ** Comment from web user: larssy1 **

Hi Pavel,

No problem, thanks for reviewing this issue after all :)

The problem still happens. On line 123 of EmailParser.cs.

A few things i've noticed:
_emailItems has the value {string[0]}
current is 0
_emailItems.Length is 0
Which results in:
```
stringBuilder.Append(this._emailItems[0 >=0 ? 0 - 1 : 0]);
```
If you need more information, please contact me :)