/// <summary>
 /// 添加私信
 /// </summary>
 /// <param name="message"></param>
 public void AddPrivateMessage(PrivateMessage message)
 {
     using (var content = new FxAggregateContext())
     {
         content.PrivateMessages.Add(message);
         content.SaveChanges();
     }
 }
 /// <summary>
 /// 删除私信
 /// </summary>
 /// <param name="message"></param>
 public void RemovePrivateMessage(PrivateMessage message)
 {
     using (var content = new FxAggregateContext())
     {
         var entity = content.PrivateMessages
             .Where(r => r.PrivateMessageId == message.PrivateMessageId).FirstOrDefault();
         if (entity != null)
         {
             content.PrivateMessages.Remove(entity);
             content.SaveChanges();
         }
     }
 }