public void AddGivePrivateLessonsAnnouncement(GivePrivateLessonsAnnouncement announcement, string senderId)
 {
     announcement.Sender    = _studentExchangeDataContext.Users.Find(senderId);
     announcement.IssueDate = DateTime.Now;
     announcement.Receivers = SetPrivateLessonsAnnouncementReceivers(senderId);
     _studentExchangeDataContext.Announcements.Add(announcement);
     _studentExchangeDataContext.SaveChanges();
 }
 public IHttpActionResult PostGive([FromBody] GivePrivateLessonsAnnouncement announcement)
 {
     _announcementService.AddGivePrivateLessonsAnnouncement(announcement, GetCurrentUserId());
     return(Content(HttpStatusCode.NoContent, ""));
 }