how to create an application send and receive as outlook by c#

private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            Outlook.MAPIFolder deletedFolder = this.Application.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderDeletedItems);
           deletedFolder.Items.ItemAdd += new Outlook.ItemsEvents_ItemAddEventHandler(DeletedItems_ItemAdd);

        }

        void DeletedItems_ItemAdd(object Item)
        {
            if (Item is Outlook.MailItem)
            {
                (Item as Outlook.MailItem).UnRead = false;
            }
            else if (Item is Outlook.AppointmentItem)
            {
                (Item as Outlook.AppointmentItem).UnRead = false;
            }
            else if (Item is Outlook.MeetingItem)
            {
                (Item as Outlook.MeetingItem).UnRead = false;
            }
            else if (Item is Outlook.ContactItem)
            {
                (Item as Outlook.ContactItem).UnRead = false;
            }
            else if (Item is Outlook.JournalItem)
            {
                (Item as Outlook.JournalItem).UnRead = false;
            }
            else if (Item is Outlook.TaskItem)
            {
                (Item as Outlook.TaskItem).UnRead = false;
            }
            else if (Item is Outlook.TaskRequestItem)
            {
                (Item as Outlook.TaskRequestItem).UnRead = false;
            }
            else if (Item is Outlook.PostItem)
            {
                (Item as Outlook.PostItem).UnRead = false;
            }
            else if (Item is Outlook.PostItem)
            {
                (Item as Outlook.PostItem).UnRead = false;
            }
        }