diff --git a/notus/Biblioteque_de_Class/Database.cs b/notus/Biblioteque_de_Class/Database.cs
index 840d946..61fc24d 100644
--- a/notus/Biblioteque_de_Class/Database.cs
+++ b/notus/Biblioteque_de_Class/Database.cs
@@ -37,10 +37,7 @@ namespace Biblioteque_de_Class
         {
             List<User> searchedUsers = new List<User>();
             string search = name.ToLower();
-            foreach (User user in UserList)
-            {
-                if (user.GetUsername().ToLower().Contains(search)) { searchedUsers.Add(user); }
-            }
+            searchedUsers.AddRange(UserList.Where(user => user.GetUsername().ToLower().Contains(search)));
             return searchedUsers;
         }
 
@@ -74,10 +71,7 @@ namespace Biblioteque_de_Class
         /// <summary>
         /// comparer le mot de passe entré avec celui de l'utilisateur
         /// </summary>
-        public bool ComparePassword(User user, string password)
-        {
-            return user.GetPassword() == password;
-        }
+        public static bool ComparePassword(User user, string password) => user.GetPassword() == password;
 
         /// <summary>
         /// rechercher un mail dans la liste d'utilisateur
diff --git a/notus/Notus_Console/Program.cs b/notus/Notus_Console/Program.cs
index 3bc93c9..706b9ad 100644
--- a/notus/Notus_Console/Program.cs
+++ b/notus/Notus_Console/Program.cs
@@ -83,7 +83,7 @@ while (boucle == 0)
             Umail = u.GetEmail();
             Upassword = u.GetPassword();
             db.FindEmail(Umail);
-            db.ComparePassword(u,Upassword);
+            Database.ComparePassword(u,Upassword);
             UserListe = db.GetUserList();
             if (UserListe.Contains(u))
             {
@@ -119,7 +119,7 @@ while (boucle == 0)
             Umail = u.GetEmail();
             db.FindEmail(Umail);
             Upassword = u.GetPassword();
-            db.ComparePassword(u,Upassword);
+            Database.ComparePassword(u,Upassword);
             UserListe = db.GetUserList();
             if (UserListe.Contains(u))
             {
diff --git a/notus/Tests/Notus_UnitTest_Database/ComparePasswordTests.cs b/notus/Tests/Notus_UnitTest_Database/ComparePasswordTests.cs
index 87960ce..a017f85 100644
--- a/notus/Tests/Notus_UnitTest_Database/ComparePasswordTests.cs
+++ b/notus/Tests/Notus_UnitTest_Database/ComparePasswordTests.cs
@@ -26,7 +26,7 @@ namespace Notus_UnitTest_Database
         {
             User user = database.GetUserList()[0];
             string password = "password123";
-            bool result = database.ComparePassword(user, password);
+            var result = Database.ComparePassword(user, password);
             Assert.That(result, Is.True);
         }
 
@@ -35,7 +35,7 @@ namespace Notus_UnitTest_Database
         {
             User user = database.GetUserList()[0];
             string password = "incorrectPassword";
-            bool result = database.ComparePassword(user, password);
+            var result = Database.ComparePassword(user, password);
             Assert.That(result, Is.False);
         }
     }