private async void BT_CompareFriends_Click(object sender, RoutedEventArgs e)
        {
            var ofd = new System.Windows.Forms.OpenFileDialog()
            {
                Filter = "Kakao Friend Data V2|*.kfd2",
                Title  = "친구 목록 불러오기"
            };

            if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                var    reader = new System.IO.StreamReader(ofd.FileName);
                string str    = reader.ReadToEnd();
                reader.Close();
                var                loadedFriends      = JsonConvert.DeserializeObject <List <string[]> >(str);
                StringBuilder      builder            = new StringBuilder("삭제된 친구 목록 : \n");
                int                count              = 0;
                int                countExpire        = 0;
                ProgressShowWindow progressShowWindow = new ProgressShowWindow();
                progressShowWindow.Show();
                progressShowWindow.Topmost = true;
                progressShowWindow.Title   = "삭제된 친구 조회";
                int progressCount = 0;
                foreach (string[] friendData in loadedFriends)
                {
                    try
                    {
                        KakaoRequestClass.notShowError = true;
                        var relationship = await KakaoRequestClass.GetProfileRelationship(friendData[1]);

                        KakaoRequestClass.notShowError = false;
                        if (!(relationship.relationship.Equals("F") || relationship.relationship.Equals("FE")))
                        {
                            KakaoRequestClass.notShowError = true;
                            var profile = await KakaoRequestClass.GetProfileFeed(friendData[1], null, true);

                            KakaoRequestClass.notShowError = false;
                            builder.Append(profile.profile.display_name);
                            builder.Append("(저장 당시 닉네임 : ");
                            builder.Append(friendData[2]);
                            builder.Append(") : ");
                            builder.Append(profile.profile.permalink);
                            builder.Append("\n");
                            count++;
                        }
                    }
                    catch (Exception) { countExpire++; }
                    progressCount++;
                    progressShowWindow.PB_Main.Value = ((double)progressCount / loadedFriends.Count) * 100.0;
                }
                Clipboard.SetDataObject(builder.ToString());
                progressShowWindow.isFinish = true;
                progressShowWindow.Close();
                MessageBox.Show($"삭제된 친구 목록이 클립보드에 복사되었습니다.\n삭제된 친구 수 : {count.ToString()}\n탈퇴한 친구 수 : {countExpire.ToString()}", "안내");
            }
        }
        private async void BT_BackupFriends_Click(object sender, RoutedEventArgs e)
        {
            StringBuilder      builder            = new StringBuilder();
            List <string[]>    ids                = new List <string[]>();
            var                friends            = JsonConvert.DeserializeObject <FriendData.Friends>(await KakaoRequestClass.GetFriendData());
            ProgressShowWindow progressShowWindow = new ProgressShowWindow();

            progressShowWindow.Show();
            progressShowWindow.Topmost = true;
            progressShowWindow.Title   = "친구 목록 백업중";
            int progressCount = 0;

            foreach (var friend in friends.profiles)
            {
                try
                {
                    KakaoRequestClass.notShowError = true;
                    var profile = await KakaoRequestClass.GetProfileFeed(friend.id, null, true);

                    KakaoRequestClass.notShowError = false;
                    builder.Append(profile.profile.display_name);
                    builder.Append(" : ");
                    builder.Append(profile.profile.permalink);
                    builder.Append("\n");
                    ids.Add(new string[] { profile.profile.permalink, profile.profile.id, profile.profile.display_name });
                }
                catch (Exception) { }
                progressCount++;
                progressShowWindow.PB_Main.Value = ((double)progressCount / friends.profiles.Count) * 100.0;
            }
            Clipboard.SetDataObject(builder.ToString());
            progressShowWindow.isFinish = true;
            progressShowWindow.Close();
            var sfd = new System.Windows.Forms.SaveFileDialog()
            {
                FileName = DateTime.Now.ToShortDateString() + ".kfd2",
                Filter   = "Kakao Friend Data V2|*.kfd2",
                Title    = "친구 목록 저장"
            };

            if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                var str    = JsonConvert.SerializeObject(ids);
                var writer = new System.IO.StreamWriter(sfd.FileName);
                writer.Write(str);
                writer.Close();
            }
            MessageBox.Show("클립보드에 친구 정보가 복사됐습니다.");
        }