diff --git a/Lib_CSharp b/Lib_CSharp
index 6b7ed8c0..e53d6712 160000
--- a/Lib_CSharp
+++ b/Lib_CSharp
@@ -1 +1 @@
-Subproject commit 6b7ed8c04f1728570c2f7575bc1ceab2b713f04b
+Subproject commit e53d671278c21d349835af31394d7bc42be49e7b
diff --git a/PoliNetwork.Graduatorie.Common/Objects/EnrollType.cs b/PoliNetwork.Graduatorie.Common/Objects/EnrollType.cs
index 2fb946ec..09d44d99 100644
--- a/PoliNetwork.Graduatorie.Common/Objects/EnrollType.cs
+++ b/PoliNetwork.Graduatorie.Common/Objects/EnrollType.cs
@@ -23,7 +23,7 @@ public int GetHashWithoutLastUpdate()
 
         return i;
     }
-    
+
     public static EnrollType From(string? rowCanEnrollInto, bool rowCanEnroll)
     {
         if (rowCanEnroll == false)
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/IndexJsonBase.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/IndexJsonBase.cs
index a21bbaea..f685e341 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/IndexJsonBase.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/IndexJsonBase.cs
@@ -3,7 +3,6 @@
 using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
 using PoliNetwork.Graduatorie.Common.Data;
-using PoliNetwork.Graduatorie.Common.Objects;
 using PoliNetwork.Graduatorie.Parser.Objects.Json.Indexes.Specific;
 using PoliNetwork.Graduatorie.Parser.Objects.RankingNS;
 
@@ -23,8 +22,8 @@ public void Write(string outFolder, string pathFile)
         var mainJsonString = JsonConvert.SerializeObject(this, Culture.JsonSerializerSettings);
         File.WriteAllText(mainJsonPath, mainJsonString);
     }
-    
-    public static void WriteAllIndexes(RankingsSet rankingsSet, string outFolder, ArgsConfig argsConfig)
+
+    public static void WriteAllIndexes(RankingsSet rankingsSet, string outFolder)
     {
         //now let's write each single different index
         BySchoolYearJson.From(rankingsSet).Write(outFolder, BySchoolYearJson.CustomPath);
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearCourseJson.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearCourseJson.cs
index 51613387..d41629b2 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearCourseJson.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearCourseJson.cs
@@ -1,9 +1,11 @@
 #region
+
 using System.Diagnostics;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
 using PoliNetwork.Graduatorie.Common.Enums;
 using PoliNetwork.Graduatorie.Parser.Objects.RankingNS;
+
 #endregion
 
 namespace PoliNetwork.Graduatorie.Parser.Objects.Json.Indexes.Specific;
@@ -20,20 +22,20 @@ namespace PoliNetwork.Graduatorie.Parser.Objects.Json.Indexes.Specific;
 public class BySchoolYearCourseJson : IndexJsonBase
 {
     internal const string CustomPath = "bySchoolYearCourse.json";
+    public List<SingleCourseJson> All = new(); // decide whether to include it in the json serialization
 
     //keys: school, year, course, location
     public SchoolsDict Schools = new();
-    public List<SingleCourseJson> All = new(); // decide whether to include it in the json serialization
 
     public static BySchoolYearCourseJson From(RankingsSet set)
     {
         var mainJson = new BySchoolYearCourseJson { LastUpdate = set.LastUpdate };
-        
+
         var list = set.Rankings
             .SelectMany(r => r.ToSingleCourseJson())
             .DistinctBy(r => new { r.Id, r.Location })
             .ToList();
-        
+
         list.Sort();
         mainJson.All = list;
 
@@ -67,7 +69,7 @@ private static YearsDict GetYearsDict(IEnumerable<IGrouping<int, Ranking>> byYea
         return yearsDict;
     }
 
-    private static CoursesDict GetCoursesDict(IGrouping<int, Ranking> yearGroup)
+    private static CoursesDict GetCoursesDict(IEnumerable<Ranking> yearGroup)
     {
         var coursesDict = new CoursesDict();
 
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearJson.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearJson.cs
index 2798b366..fd5a1c5f 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearJson.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/BySchoolYearJson.cs
@@ -18,9 +18,9 @@ namespace PoliNetwork.Graduatorie.Parser.Objects.Json.Indexes.Specific;
 public class BySchoolYearJson : IndexJsonBase
 {
     internal const string CustomPath = "bySchoolYear.json";
+    public List<SingleCourseJson> All = new(); // decide whether to include it in the json serialization
 
     public SchoolsDict Schools = new();
-    public List<SingleCourseJson> All = new(); // decide whether to include it in the json serialization
 
     public static BySchoolYearJson From(RankingsSet set)
     {
@@ -30,7 +30,7 @@ public static BySchoolYearJson From(RankingsSet set)
             .SelectMany(r => r.ToSingleCourseJson())
             .DistinctBy(r => new { r.Id })
             .ToList();
-        
+
         list.Sort();
         mainJson.All = list;
 
@@ -90,15 +90,7 @@ public static RankingsSet GetAndParse(string dataFolder)
 
     public List<Ranking> GetRankings(string outFolder)
     {
-        List<Ranking> rankings = new();
-
-        foreach (var singleCourseJson in All)
-        {
-            var fullPath = singleCourseJson.GetFullPath(outFolder);
-            var ranking = Ranking.FromJson(fullPath);
-            if (ranking != null) rankings.Add(ranking);
-        }
-
-        return rankings;
+        return All.Select(singleCourseJson => singleCourseJson.GetFullPath(outFolder)).Select(Ranking.FromJson)
+            .OfType<Ranking>().ToList();
     }
 }
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/ByYearSchoolJson.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/ByYearSchoolJson.cs
index a5b153ef..d1e973b9 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/ByYearSchoolJson.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Indexes/Specific/ByYearSchoolJson.cs
@@ -17,22 +17,22 @@ namespace PoliNetwork.Graduatorie.Parser.Objects.Json.Indexes.Specific;
 public class ByYearSchoolJson : IndexJsonBase
 {
     internal const string CustomPath = "byYearSchool.json";
+    public List<SingleCourseJson> All = new(); // decide whether to include it in the json serialization
 
     public YearsDict Years = new();
-    public List<SingleCourseJson> All = new(); // decide whether to include it in the json serialization
 
     public static ByYearSchoolJson From(RankingsSet set)
     {
         var mainJson = new ByYearSchoolJson { LastUpdate = set.LastUpdate };
-        
+
         var list = set.Rankings
             .SelectMany(r => r.ToSingleCourseJson()).ToList()
             .DistinctBy(r => new { r.Id })
             .ToList();
-        
+
         list.Sort();
         mainJson.All = list;
-        
+
         // group rankings by year
         var byYear = set.Rankings.Where(r => r.Year != null).GroupBy(r => r.Year!.Value);
         foreach (var yearGroup in byYear)
@@ -57,7 +57,7 @@ private static SchoolsDict GetSchoolsDict(IEnumerable<IGrouping<SchoolEnum, Rank
                 .DistinctBy(x => x.Link)
                 .OrderBy(r => r.Id)
                 .ToList();
-                
+
             schoolsDict.Add(schoolGroup.Key, filenames);
         }
 
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/SingleCourseJson.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/SingleCourseJson.cs
index 99938652..ad6842e4 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/SingleCourseJson.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/SingleCourseJson.cs
@@ -22,25 +22,10 @@ public class SingleCourseJson : IComparable<SingleCourseJson>
     public SchoolEnum? School;
     public int? Year;
 
-    public static SingleCourseJson From(Ranking ranking, CourseTable? course)
-    {
-        var basePath = $"{ranking.School}/{ranking.Year}/"; // "Ingegneria/2023"
-        return new SingleCourseJson
-        {
-            Link = ranking.GetFilename(),
-            Id = ranking.GetId(),
-            BasePath = basePath,
-            Year = ranking.Year,
-            School = ranking.School,
-            Location = course?.Location,
-            RankingOrder = ranking.RankingOrder
-        };
-    }
-
     public int CompareTo(SingleCourseJson? singleCourseJson)
     {
         if (singleCourseJson == null) return 1;
-        
+
         if (Year != singleCourseJson.Year)
             return (Year ?? -1) < (singleCourseJson.Year ?? -1) ? -1 : 1;
 
@@ -60,7 +45,22 @@ public int CompareTo(SingleCourseJson? singleCourseJson)
 
         return 0;
     }
-    
+
+    public static SingleCourseJson From(Ranking ranking, CourseTable? course)
+    {
+        var basePath = $"{ranking.School}/{ranking.Year}/"; // "Ingegneria/2023"
+        return new SingleCourseJson
+        {
+            Link = ranking.GetFilename(),
+            Id = ranking.GetId(),
+            BasePath = basePath,
+            Year = ranking.Year,
+            School = ranking.School,
+            Location = course?.Location,
+            RankingOrder = ranking.RankingOrder
+        };
+    }
+
     public int GetHashWithoutLastUpdate()
     {
         var hashWithoutLastUpdate = Link?.GetHashCode() ?? "Link".GetHashCode();
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsJson.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsJson.cs
index ca80c939..1befb2b1 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsJson.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsJson.cs
@@ -5,6 +5,7 @@
 using Newtonsoft.Json.Serialization;
 using PoliNetwork.Graduatorie.Common.Objects;
 using PoliNetwork.Graduatorie.Parser.Objects.RankingNS;
+
 // ReSharper disable CanSimplifyDictionaryLookupWithTryAdd
 
 #endregion
@@ -41,10 +42,7 @@ public void Write(string outFolder, ArgsConfig argsConfig)
         var statsFolderPath = Path.Join(outFolder, StatsFolderName);
         if (!Directory.Exists(statsFolderPath)) Directory.CreateDirectory(statsFolderPath);
 
-        foreach (var yearStats in Stats.Values)
-        {
-            yearStats.Write(statsFolderPath, argsConfig);
-        }
+        foreach (var yearStats in Stats.Values) yearStats.Write(statsFolderPath, argsConfig);
     }
 
     public int GetHashWithoutLastUpdate()
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsSchool.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsSchool.cs
index 428a772f..0a80f736 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsSchool.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsSchool.cs
@@ -17,10 +17,10 @@ public class StatsSchool
     public List<StatsSingleCourseJson> List = new();
     public int NumStudents;
 
-    public static StatsSchool From(List<Ranking> pRankings)
+    public static StatsSchool From(IEnumerable<Ranking> pRankings)
     {
         var statsSchool = new StatsSchool();
-        var rankings = pRankings.Where(r => r.Year != null && r.School != null).ToList();
+        var rankings = pRankings.Where(r => r is { Year: not null, School: not null }).ToList();
 
         statsSchool.NumStudents =
             rankings.Select(x => (x.RankingSummary ?? x.CreateSummary()).HowManyStudents ?? 0).Sum();
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsYear.cs b/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsYear.cs
index c3a80552..53d4805a 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsYear.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Json/Stats/StatsYear.cs
@@ -7,6 +7,7 @@
 using PoliNetwork.Graduatorie.Common.Enums;
 using PoliNetwork.Graduatorie.Common.Objects;
 using PoliNetwork.Graduatorie.Parser.Objects.RankingNS;
+
 // ReSharper disable CanSimplifyDictionaryLookupWithTryAdd
 
 #endregion
@@ -19,27 +20,29 @@ namespace PoliNetwork.Graduatorie.Parser.Objects.Json.Stats;
 [JsonObject(MemberSerialization.Fields, NamingStrategyType = typeof(CamelCaseNamingStrategy))]
 public class StatsYear
 {
-    public SchoolsDict Schools = new();
     public int NumStudents;
+    public SchoolsDict Schools = new();
     public int Year;
 
     public static StatsYear From(List<Ranking> rankings)
     {
-        var statsYear = new StatsYear();
-        
-        statsYear.Year = rankings.First(r => r.Year != null).Year!.Value; // just hilarious
-        statsYear.NumStudents =
-            rankings.Select(r => (r.RankingSummary ?? r.CreateSummary()).HowManyStudents ?? 0).Sum(); // this ?? is crazy
+        var statsYear = new StatsYear
+        {
+            Year = rankings.First(r => r.Year != null).Year!.Value, // just hilarious
+            NumStudents = rankings.Select(r => (r.RankingSummary ?? r.CreateSummary()).HowManyStudents ?? 0)
+                .Sum() // this ?? is crazy
+        };
 
         var bySchool = rankings.Where(r => r.School != null).GroupBy(r => r.School!.Value);
         foreach (var schoolGroup in bySchool)
         {
             var statsSchool = StatsSchool.From(schoolGroup.ToList());
 
-            if (statsYear.Schools.ContainsKey(schoolGroup.Key)) throw new UnreachableException(); // should be impossible, right?
+            if (statsYear.Schools.ContainsKey(schoolGroup.Key))
+                throw new UnreachableException(); // should be impossible, right?
             statsYear.Schools.Add(schoolGroup.Key, statsSchool);
         }
-        
+
         return statsYear;
     }
 
@@ -62,7 +65,7 @@ private bool ExitIfThereIsntAnUpdate(string fullJsonPath)
             var savedStats = JsonConvert.DeserializeObject<StatsYear>(saved, Culture.JsonSerializerSettings);
 
             if (string.IsNullOrEmpty(saved) || savedStats == null) return false;
-            
+
             var savedHash = savedStats.GetHashWithoutLastUpdate();
             var hash = GetHashWithoutLastUpdate();
             return savedHash == hash;
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/Ranking.cs b/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/Ranking.cs
index 56fbc52b..2eac3d2f 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/Ranking.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/Ranking.cs
@@ -30,23 +30,6 @@ public class Ranking : IComparable<Ranking>, IEquatable<Ranking>
     public RankingUrl? Url;
     public int? Year;
 
-    public RankingSummaryStudent GetRankingSummaryStudent()
-    {
-        return new RankingSummaryStudent(RankingOrder?.Phase, School, Year, Url);
-    }
-    
-    public static Ranking? FromJson(string fullPath)
-    {
-        // if (!File.Exists(fullPath)) return null;
-        //
-        // var str = File.ReadAllText(fullPath);
-        // var ranking = JsonConvert.DeserializeObject<Ranking>(str, Culture.JsonSerializerSettings);
-        // return ranking;
-        
-        // consider merging the two functions at some point
-        return Utils.Transformer.ParserNS.Parser.ParseJsonRanking(fullPath);
-    }
-
     public int CompareTo(Ranking? other)
     {
         if (ReferenceEquals(this, other)) return 0;
@@ -62,6 +45,23 @@ public bool Equals(Ranking? other)
         return GetHashWithoutLastUpdate() == other.GetHashWithoutLastUpdate();
     }
 
+    public RankingSummaryStudent GetRankingSummaryStudent()
+    {
+        return new RankingSummaryStudent(RankingOrder?.Phase, School, Year, Url);
+    }
+
+    public static Ranking? FromJson(string fullPath)
+    {
+        // if (!File.Exists(fullPath)) return null;
+        //
+        // var str = File.ReadAllText(fullPath);
+        // var ranking = JsonConvert.DeserializeObject<Ranking>(str, Culture.JsonSerializerSettings);
+        // return ranking;
+
+        // consider merging the two functions at some point
+        return Utils.Transformer.ParserNS.Parser.ParseJsonRanking(fullPath);
+    }
+
 
     public bool IsSimilarTo(Ranking ranking)
     {
@@ -142,19 +142,18 @@ public void WriteAsJson(string outFolder, bool forceReparse = false)
     {
         var folderPath = GetBasePath(outFolder);
         Directory.CreateDirectory(folderPath);
-        
+
         var fullPath = GetFullPath(outFolder);
 
         var savedRanking = FromJson(fullPath);
         var equalsSaved = savedRanking != null && Equals(savedRanking);
 
-        if (forceReparse || equalsSaved || savedRanking == null)
-        {
-            var rankingJsonString = JsonConvert.SerializeObject(this, Culture.JsonSerializerSettings);
-            File.WriteAllText(fullPath, rankingJsonString);
-        }
+        if (!forceReparse && equalsSaved) return;
+
+        var rankingJsonString = JsonConvert.SerializeObject(this, Culture.JsonSerializerSettings);
+        File.WriteAllText(fullPath, rankingJsonString);
     }
-    
+
     /***
      * Ottieni l'hash senza considerare il valore di LastUpdate
      */
@@ -177,10 +176,19 @@ public int GetHashWithoutLastUpdate()
             i = ByCourse.Aggregate(i, (current, variable) =>
             {
                 var hashWithoutLastUpdate = variable.GetHashWithoutLastUpdate();
-                var iList = hashWithoutLastUpdate;
-                return current ^ iList;
+                return current ^ hashWithoutLastUpdate;
             });
 
         return i;
     }
+
+    public override bool Equals(object? obj)
+    {
+        return Equals(obj as Ranking);
+    }
+
+    public override int GetHashCode()
+    {
+        return GetHashWithoutLastUpdate();
+    }
 }
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/RankingsSet.cs b/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/RankingsSet.cs
index 908d396a..d129cfa4 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/RankingsSet.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/RankingNS/RankingsSet.cs
@@ -11,27 +11,19 @@ namespace PoliNetwork.Graduatorie.Parser.Objects.RankingNS;
 [JsonObject(MemberSerialization.Fields, NamingStrategyType = typeof(CamelCaseNamingStrategy))]
 public class RankingsSet
 {
-    public DateTime? LastUpdate;
-    public List<Ranking> Rankings;
-
-    public RankingsSet()
-    {
-        Rankings = new List<Ranking>();
-        LastUpdate = DateTime.UtcNow;
-    }
+    public DateTime? LastUpdate = DateTime.UtcNow;
+    public List<Ranking> Rankings = new();
 
     public void Merge(RankingsSet newSet)
     {
         foreach (var ranking in newSet.Rankings)
         {
             var alreadyPresent = Rankings.Any(v => v.IsSimilarTo(ranking));
-            if (!alreadyPresent)
-            {
-                Rankings.Add(ranking);
-                    
-                if (LastUpdate == null || ranking.LastUpdate.Date > LastUpdate?.Date) 
-                    LastUpdate = ranking.LastUpdate;
-            }
+            if (alreadyPresent) continue;
+            Rankings.Add(ranking);
+
+            if (LastUpdate == null || ranking.LastUpdate.Date > LastUpdate?.Date)
+                LastUpdate = ranking.LastUpdate;
         }
     }
 
diff --git a/PoliNetwork.Graduatorie.Parser/Objects/Tables/Course/CourseTable.cs b/PoliNetwork.Graduatorie.Parser/Objects/Tables/Course/CourseTable.cs
index 17aac09b..4e6360fa 100644
--- a/PoliNetwork.Graduatorie.Parser/Objects/Tables/Course/CourseTable.cs
+++ b/PoliNetwork.Graduatorie.Parser/Objects/Tables/Course/CourseTable.cs
@@ -31,8 +31,8 @@ public RankingSummaryStudent GetRankingSummaryStudent(Ranking ranking)
     }
 
     /// <summary>
-    /// Get the course location if present, otherwise get the placeholder (constant).
-    /// Useful for index purposes.
+    ///     Get the course location if present, otherwise get the placeholder (constant).
+    ///     Useful for index purposes.
     /// </summary>
     /// <returns>A string with the location or the placeholder</returns>
     public string GetFixedLocation()
@@ -41,7 +41,6 @@ public string GetFixedLocation()
         // esempio: Urbanistica 2022 ha un solo corso senza location, ma anche quello
         // deve comparire nella lista
         // fix: se un corso non ha location, si inserisce un valore 0
-        if (string.IsNullOrEmpty(Location)) return Constants.LocationPlaceholder;
-        return Location;
+        return string.IsNullOrEmpty(Location) ? Constants.LocationPlaceholder : Location;
     }
 }
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Parser/Utils/Output/HashMatricoleWrite.cs b/PoliNetwork.Graduatorie.Parser/Utils/Output/HashMatricoleWrite.cs
index 86d4ae06..80396565 100644
--- a/PoliNetwork.Graduatorie.Parser/Utils/Output/HashMatricoleWrite.cs
+++ b/PoliNetwork.Graduatorie.Parser/Utils/Output/HashMatricoleWrite.cs
@@ -12,21 +12,21 @@ namespace PoliNetwork.Graduatorie.Parser.Utils.Output;
 
 public class HashMatricoleWrite
 {
-    internal const string FolderName = "hashMatricole";
-    public IdsDict IdsDict = new();
+    private const string FolderName = "hashMatricole";
+    private IdsDict _idsDict = new();
 
     public static HashMatricoleWrite From(RankingsSet rankingsSet)
     {
         return new HashMatricoleWrite
         {
-            IdsDict = GetIdsDict(rankingsSet)
+            _idsDict = GetIdsDict(rankingsSet)
         };
     }
-    
+
 
     public void Write(string outFolder)
     {
-        Console.WriteLine($"[INFO] Students with id are {IdsDict.Keys.Count}");
+        Console.WriteLine($"[INFO] Students with id are {_idsDict.Keys.Count}");
 
         var groupsDict = GetGroupsDict();
         var hashMatricoleFolder = Path.Join(outFolder, FolderName);
@@ -43,7 +43,7 @@ public void Write(string outFolder)
 
     private static IdsDict GetIdsDict(RankingsSet rankingsSet)
     {
-        var dictionary = new SortedDictionary<string, StudentHashSummary>();
+        var dictionary = new IdsDict();
         foreach (var ranking in rankingsSet.Rankings)
         {
             var byMeritRows = ranking.ByMerit?.Rows;
@@ -63,17 +63,14 @@ private static IdsDict GetIdsDict(RankingsSet rankingsSet)
                 foreach (var student in row.Where(studentResult => !string.IsNullOrEmpty(studentResult.Id)))
                 {
                     var id = student.Id!;
-                    
+
                     if (!dictionary.ContainsKey(id)) dictionary.Add(id, new StudentHashSummary());
                     dictionary[id].Merge(student, ranking, courseTable);
                 }
             }
         }
 
-        foreach (var item in dictionary.Values)
-        {
-            item.Sort();
-        }
+        foreach (var item in dictionary.Values) item.Sort();
 
         return dictionary;
     }
@@ -81,7 +78,7 @@ private static IdsDict GetIdsDict(RankingsSet rankingsSet)
     private SortedDictionary<string, IdsDict> GetGroupsDict()
     {
         var groupsDict = new SortedDictionary<string, IdsDict>();
-        var groups = IdsDict.GroupBy(pair => pair.Key[..2]);
+        var groups = _idsDict.GroupBy(pair => pair.Key[..2]);
 
         foreach (var group in groups)
         {
@@ -89,11 +86,8 @@ private SortedDictionary<string, IdsDict> GetGroupsDict()
             var groupVal = group.ToList();
 
             var groupIdsDict = new IdsDict();
-            foreach (var (id, studentHashSummary) in groupVal)
-            {
-                groupIdsDict.Add(id, studentHashSummary);
-            }
-            
+            foreach (var (id, studentHashSummary) in groupVal) groupIdsDict.Add(id, studentHashSummary);
+
             groupsDict.Add(groupId, groupIdsDict);
         }
 
diff --git a/PoliNetwork.Graduatorie.Parser/Utils/Output/OutputWriteUtil.cs b/PoliNetwork.Graduatorie.Parser/Utils/Output/OutputWriteUtil.cs
index 1f422b5e..3e294db8 100644
--- a/PoliNetwork.Graduatorie.Parser/Utils/Output/OutputWriteUtil.cs
+++ b/PoliNetwork.Graduatorie.Parser/Utils/Output/OutputWriteUtil.cs
@@ -23,9 +23,9 @@ public OutputWriteUtil(ArgsConfig argsConfig)
     public void SaveOutputs(RankingsSet rankingsSet, DateFound dateFound)
     {
         var outFolder = Path.Join(_config.DataFolder, Constants.OutputFolder);
-        
+
         rankingsSet.WriteAllRankings(outFolder, _config.ForceReparsing);
-        IndexJsonBase.WriteAllIndexes(rankingsSet, outFolder, _config);
+        IndexJsonBase.WriteAllIndexes(rankingsSet, outFolder);
         StatsJson.From(rankingsSet).Write(outFolder, _config);
         HashMatricoleWrite.From(rankingsSet).Write(outFolder);
 
diff --git a/PoliNetwork.Graduatorie.Parser/Utils/Output/RankingSummaryStudent.cs b/PoliNetwork.Graduatorie.Parser/Utils/Output/RankingSummaryStudent.cs
index 2a0299f8..52e783ef 100644
--- a/PoliNetwork.Graduatorie.Parser/Utils/Output/RankingSummaryStudent.cs
+++ b/PoliNetwork.Graduatorie.Parser/Utils/Output/RankingSummaryStudent.cs
@@ -40,6 +40,14 @@ public RankingSummaryStudent(string? phase, SchoolEnum? school, int? year, Ranki
         Url = url;
     }
 
+    public bool Equals(RankingSummaryStudent? other)
+    {
+        if (ReferenceEquals(null, other)) return false;
+        if (ReferenceEquals(this, other)) return true;
+        return Course == other.Course && Phase == other.Phase && School == other.School && Equals(Url, other.Url) &&
+               Year == other.Year;
+    }
+
     public int Compare(RankingSummaryStudent o)
     {
         var i = (Year ?? 0) - (o.Year ?? 0);
@@ -70,13 +78,6 @@ public override bool Equals(object? obj)
                Year == rankingSummaryStudent.Year && equals && Course == rankingSummaryStudent.Course;
     }
 
-    public bool Equals(RankingSummaryStudent? other)
-    {
-        if (ReferenceEquals(null, other)) return false;
-        if (ReferenceEquals(this, other)) return true;
-        return Course == other.Course && Phase == other.Phase && School == other.School && Equals(Url, other.Url) && Year == other.Year;
-    }
-
     public override int GetHashCode()
     {
         return HashCode.Combine(Course, Phase, School, Url, Year);
diff --git a/PoliNetwork.Graduatorie.Parser/Utils/Transformer/ParserNS/Converter.cs b/PoliNetwork.Graduatorie.Parser/Utils/Transformer/ParserNS/Converter.cs
deleted file mode 100644
index fc32e7a4..00000000
--- a/PoliNetwork.Graduatorie.Parser/Utils/Transformer/ParserNS/Converter.cs
+++ /dev/null
@@ -1,49 +0,0 @@
-#region
-
-using PoliNetwork.Graduatorie.Common.Objects;
-using PoliNetwork.Graduatorie.Parser.Objects;
-using PoliNetwork.Graduatorie.Parser.Objects.Tables.Course;
-using PoliNetwork.Graduatorie.Parser.Objects.Tables.Merit;
-
-#endregion
-
-namespace PoliNetwork.Graduatorie.Parser.Utils.Transformer.ParserNS;
-
-public static class Converter
-{
-    public static StudentResult FromMeritTableToStudentResult(MeritTableRow row)
-    {
-        var rowCanEnroll = row.CanEnroll ?? false;
-        var rowCanEnrollInto = rowCanEnroll ? row.CanEnrollInto : null;
-        return new StudentResult
-        {
-            Id = row.Id,
-            Ofa = row.Ofa,
-            Result = row.Result,
-            BirthDate = null,
-            PositionAbsolute = row.Position,
-            PositionCourse = null,
-            SectionsResults = null,
-            EnglishCorrectAnswers = null,
-            EnrollType = EnrollType.From(rowCanEnrollInto, rowCanEnroll)
-        };
-    }
-
-
-    public static StudentResult FromCourseTableRowToStudentResult(CourseTableRow row, Table<CourseTableRow> course)
-    {
-        var rowCanEnroll = row.CanEnroll ?? false;
-        return new StudentResult
-        {
-            Id = row.Id,
-            Ofa = row.Ofa,
-            Result = row.Result,
-            BirthDate = row.BirthDate,
-            EnrollType = EnrollType.From(course.CourseTitle, rowCanEnroll),
-            PositionAbsolute = null,
-            PositionCourse = row.Position,
-            SectionsResults = row.SectionsResults,
-            EnglishCorrectAnswers = row.EnglishCorrectAnswers
-        };
-    }
-}
\ No newline at end of file
diff --git a/PoliNetwork.Graduatorie.Scraper/Utils/Web/ScraperOutput.cs b/PoliNetwork.Graduatorie.Scraper/Utils/Web/ScraperOutput.cs
index 0313a170..24ca314e 100644
--- a/PoliNetwork.Graduatorie.Scraper/Utils/Web/ScraperOutput.cs
+++ b/PoliNetwork.Graduatorie.Scraper/Utils/Web/ScraperOutput.cs
@@ -9,7 +9,6 @@ namespace PoliNetwork.Graduatorie.Scraper.Utils.Web;
 
 public static class ScraperOutput
 {
-
     public static List<RankingUrl> GetWithUrlsFromLocalFileLinks(IEnumerable<RankingUrl> urls, string dataFolder)
     {
         var links = GetSaved(dataFolder);
@@ -32,11 +31,11 @@ private static List<RankingUrl> GetSaved(string dataFolder)
         {
             // consider to handle them
             Console.WriteLine($"[ERROR] Can't validate the ScraperOutput file ({filePath})");
-            return new();
+            return new List<RankingUrl>();
         }
     }
 
-    private static List<string> GetLines(string filePath)
+    private static IEnumerable<string> GetLines(string filePath)
     {
         try
         {
@@ -46,7 +45,7 @@ private static List<string> GetLines(string filePath)
         {
             Console.WriteLine(exception);
             Console.WriteLine($"[ERROR] Can't read the ScraperOutput file ({filePath})");
-            return new();
+            return new List<string>();
         }
     }
 
@@ -84,7 +83,7 @@ private static string SelectorUrlWithEndLine(string url)
     {
         return url + "\n";
     }
-    
+
     private static string GetFilePath(string dataFolder)
     {
         return Path.Join(dataFolder, Constants.OutputLinksFilename);