public function Add($Recipient = '') {
      $this->Form->SetModel($this->ConversationModel);
      
      if ($this->Form->AuthenticatedPostBack()) {
         $RecipientUserIDs = array();
         $To = explode(',', $this->Form->GetFormValue('To', ''));
         $UserModel = new UserModel();
         foreach ($To as $Name) {
            if (trim($Name) != '') {
               $User = $UserModel->GetByUsername(trim($Name));
               if (is_object($User))
                  $RecipientUserIDs[] = $User->UserID;
            }
         }
         
         $this->EventArguments['Recipients'] = $RecipientUserIDs;
         $this->FireEvent('BeforeAddConversation');
         
         $this->Form->SetFormValue('RecipientUserID', $RecipientUserIDs);
         $ConversationID = $this->Form->Save($this->ConversationMessageModel);
         if ($ConversationID !== FALSE) {
            $Target = $this->Form->GetFormValue('Target', 'messages/'.$ConversationID);
            
            $this->RedirectUrl = Url($Target);
         }
      } else {
         if ($Recipient != '')
            $this->Form->SetValue('To', $Recipient);
      }
      if ($Target = Gdn::Request()->Get('Target'))
            $this->Form->AddHidden('Target', $Target);

      Gdn_Theme::Section('PostConversation');
      $this->Title(T('New Conversation'));
      $this->SetData('Breadcrumbs', array(array('Name' => T('Inbox'), 'Url' => '/messages/inbox'), array('Name' => $this->Data('Title'), 'Url' => 'messages/add')));
      $this->Render();      
   }