diff --git a/Persistance/DataContractPersistance.cs b/Persistance/DataContractPersistance.cs
index cb2b4de..8523f36 100644
--- a/Persistance/DataContractPersistance.cs
+++ b/Persistance/DataContractPersistance.cs
@@ -47,15 +47,15 @@ namespace Persistance
 
 
         // Listes des requins et utilisateurs
-        ObservableCollection<Requin> requins = new ObservableCollection<Requin>();
-        ObservableCollection<Requin> requinsAdd = new ObservableCollection<Requin>();
-        ObservableCollection<Requin> requinsEdit = new ObservableCollection<Requin>();
+        List<Requin> requins = new List<Requin>();
+        List<Requin> requinsAdd = new List<Requin>();
+        List<Requin> requinsEdit = new List<Requin>();
         List<Personne> users = new List<Personne>();
 
 
 
         // Méthodes pour les requins de l'application
-        public ObservableCollection<Requin> LoadRequins()
+        public List<Requin> LoadRequins()
         {
             if (!File.Exists(FileReq))
             {
@@ -64,12 +64,12 @@ namespace Persistance
 
             using (Stream stream = File.OpenRead(FileReq))
             {
-                requins = SerializerReq.ReadObject(stream) as ObservableCollection<Requin>;
+                requins = SerializerReq.ReadObject(stream) as List<Requin>;
             }
 
             return requins;
         }
-        public void SaveRequins(ObservableCollection<Requin> reqs)
+        public void SaveRequins(List<Requin> reqs)
         {
             if (!Directory.Exists(FilePath))
             {
@@ -85,7 +85,7 @@ namespace Persistance
 
 
         // Méthodes pour les requins ajoutés par les Utilisateurs
-        public ObservableCollection<Requin> LoadRequinsAdd()
+        public List<Requin> LoadRequinsAdd()
         {
             if (!File.Exists(FileReqAdd))
             {
@@ -94,13 +94,13 @@ namespace Persistance
 
             using (Stream stream = File.OpenRead(FileReqAdd))
             {
-                requinsAdd = SerializerReq.ReadObject(stream) as ObservableCollection<Requin>;
+                requinsAdd = SerializerReq.ReadObject(stream) as List<Requin>;
             }
 
             return requinsAdd;
         }
 
-        public void SaveRequinsAdd(ObservableCollection<Requin> reqs)
+        public void SaveRequinsAdd(List<Requin> reqs)
         {
             if (!Directory.Exists(FilePath))
             {
@@ -116,7 +116,7 @@ namespace Persistance
 
 
         // Méthodes pour les requins édités par les utilisateurs
-        public ObservableCollection<Requin> LoadRequinsEdit()
+        public List<Requin> LoadRequinsEdit()
         {
             if (!File.Exists(FileReqEdit))
             {
@@ -125,13 +125,13 @@ namespace Persistance
 
             using (Stream stream = File.OpenRead(FileReqEdit))
             {
-                requinsEdit = SerializerReq.ReadObject(stream) as ObservableCollection<Requin>;
+                requinsEdit = SerializerReq.ReadObject(stream) as List<Requin>;
             }
 
             return requinsEdit;
         }
 
-        public void SaveRequinsEdit(ObservableCollection<Requin> reqs)
+        public void SaveRequinsEdit(List<Requin> reqs)
         {
             if (!Directory.Exists(FilePath))
             {