private async void IC_Friend_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
 {
     if (relationship.relationship.Equals("F"))
     {
         bool isDelete = MessageBox.Show("친구를 삭제하시겠습니까?", "안내", MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.Yes;
         if (isDelete)
         {
             await KakaoRequestClass.DeleteFriend(relationship.id);
             await RefreshTimeline(null, true);
         }
     }
     else if (relationship.relationship.Equals("R"))
     {
         bool isRequest = MessageBox.Show("이 사용자에게 친구 신청을 보내시겠습니까?", "안내", MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.Yes;
         if (isRequest)
         {
             await KakaoRequestClass.FriendRequest(relationship.id, true);
             await RefreshTimeline(null, true);
         }
     }
     else if (relationship.relationship.Equals("C"))
     {
         var question = MessageBox.Show("친구 신청을 수락하시겠습니까?", "안내", MessageBoxButton.YesNo, MessageBoxImage.Question);
         if (question != MessageBoxResult.Cancel && question != MessageBoxResult.None)
         {
             bool isDelete = question == MessageBoxResult.No;
             await KakaoRequestClass.FriendAccept(relationship.id, isDelete);
             await RefreshTimeline(null, true);
         }
     }
     else if (relationship.relationship.Equals("N"))
     {
         await KakaoRequestClass.FriendRequest(relationship.id, false);
         await RefreshTimeline(null, true);
     }
 }