diff --git a/notus/Biblioteque_de_Class/Category.cs b/notus/Biblioteque_de_Class/Category.cs
new file mode 100644
index 0000000..6466376
--- /dev/null
+++ b/notus/Biblioteque_de_Class/Category.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Biblioteque_de_Class
+{
+    internal class Category
+    {
+        public string nom { get; set; }
+    }
+}
diff --git a/notus/Biblioteque_de_Class/Class1.cs b/notus/Biblioteque_de_Class/Class1.cs
deleted file mode 100644
index 29c9b95..0000000
--- a/notus/Biblioteque_de_Class/Class1.cs
+++ /dev/null
@@ -1,7 +0,0 @@
-namespace Biblioteque_de_Class
-{
-    public class Class1
-    {
-
-    }
-}
\ No newline at end of file
diff --git a/notus/Biblioteque_de_Class/Note.cs b/notus/Biblioteque_de_Class/Note.cs
new file mode 100644
index 0000000..2d9c840
--- /dev/null
+++ b/notus/Biblioteque_de_Class/Note.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Biblioteque_de_Class
+{
+    internal class Note
+    {
+        public string nom = "Note sans nom";
+        public string logoPATH = "PATH TO DEFAULT LOGO";
+        public List<Category> tag;
+
+        public Note(string Nnom, string llogoPATH, List<Category> basetags)
+        {
+            nom = Nnom;
+            logoPATH = llogoPATH;
+            tag = basetags;
+        }
+    }
+}
diff --git a/notus/Biblioteque_de_Class/Utilisateur.cs b/notus/Biblioteque_de_Class/Utilisateur.cs
new file mode 100644
index 0000000..1aa6cea
--- /dev/null
+++ b/notus/Biblioteque_de_Class/Utilisateur.cs
@@ -0,0 +1,24 @@
+namespace Biblioteque_de_Class
+{
+    public class Utilisateur
+    {
+        private string Psd { get; set; }
+        private string Mail { get; set; }
+        private string Mdp { get; set; }
+        private List<Note> NoteList;
+
+        public Utilisateur(string Upseudo, string Umail, string Upassword)
+        {
+            Psd = Upseudo; 
+            Mail=Umail; 
+            Mdp = Upassword;
+            NoteList = new List<Note>();
+        }
+
+        public override string ToString()
+        {
+            return $"pseudo : {Psd}\nmail : {Mail}\npassword : {Mdp}\nNote possédé : { NoteList.Count}";
+        }
+
+    }
+}
\ No newline at end of file