protected void btnDelete_Click(object sender, EventArgs e)
    {
        string messageId = ((Button)sender).CommandArgument;

        PrivateMessagesManager.DeletePrivateMessage(messageId);

        OpenInbox();
    }
 protected void btnDeleteOpenedMessage_Click(object sender, EventArgs e)
 {
     PrivateMessagesManager.DeletePrivateMessage(hidPrivateMessageId.Value);
     OpenInbox();
 }