/// <summary>
        /// Send message to wallboard.
        /// </summary>
        /// <param name="type">Content type (text, music, etc).</param>
        /// <param name="senderID">Who send message.</param>
        /// <param name="receiverID">Who receive message.</param>
        /// <param name="message">Message content.</param>
        public static void InsertMessage(WallBoardItemType type, Guid senderID, Guid receiverID, Object message)
        {
            using (SocialNetworkDBEntities record = new SocialNetworkDBEntities())
            {
                switch (type)
                {
                case WallBoardItemType.Text:
                {
                    record.spInsWallBoardTextMessage(
                        (Int32)WallBoardItemType.Text, senderID, receiverID, (String)message);
                }
                break;

                case WallBoardItemType.Image:
                {
                }
                break;

                case WallBoardItemType.Audio:
                {
                }
                break;

                case WallBoardItemType.Video:
                {
                }
                break;
                }
            }
        }
 /// <summary>
 /// Send message to wallboard.
 /// </summary>
 /// <param name="type">Content type (text, music, etc).</param>
 /// <param name="senderID">Who send message.</param>
 /// <param name="receiverID">Who receive message.</param>
 /// <param name="message">Message content.</param>
 public static void InsertMessage(WallBoardItemType type, Guid senderID, Guid receiverID, Object message)
 {
     using (SocialNetworkDBEntities record = new SocialNetworkDBEntities())
     {
         switch (type)
         {
             case WallBoardItemType.Text:
                 {
                     record.spInsWallBoardTextMessage(
                         (Int32)WallBoardItemType.Text, senderID, receiverID, (String)message);
                 }
                 break;
             case WallBoardItemType.Image:
                 {
                 }
                 break;
             case WallBoardItemType.Audio:
                 {
                 }
                 break;
             case WallBoardItemType.Video:
                 {
                 }
                 break;
         }
     }
 }