diff --git a/Webzine.Business.Contracts/IDashboardService.cs b/Webzine.Business.Contracts/IDashboardService.cs
index 8bde456..423880f 100644
--- a/Webzine.Business.Contracts/IDashboardService.cs
+++ b/Webzine.Business.Contracts/IDashboardService.cs
@@ -1,7 +1,7 @@
-using Webzine.Business.Contracts.Dto;
-
 namespace Webzine.Business.Contracts;
 
+using Webzine.Business.Contracts.Dto;
+
 /// <summary>
 /// Service responsable du calcul des statistiques affichées sur le tableau de bord d'administration.
 /// Agrège les données provenant de plusieurs repositories pour produire un résumé cohérent.
diff --git a/Webzine.Business/DashboardService.cs b/Webzine.Business/DashboardService.cs
index d9e9812..f1b566d 100644
--- a/Webzine.Business/DashboardService.cs
+++ b/Webzine.Business/DashboardService.cs
@@ -1,10 +1,9 @@
-using Webzine.Business.Contracts;
-using Webzine.Entity;
-using Webzine.Repository.Contracts;
-
 namespace Webzine.Business;
 
-using Contracts.Dto;
+using Webzine.Business.Contracts;
+using Webzine.Business.Contracts.Dto;
+using Webzine.Entity;
+using Webzine.Repository.Contracts;
 
 /// <summary>
 /// Implémentation de <see cref="IDashboardService"/>.
diff --git a/Webzine.WebApplication/Areas/Administration/Controllers/DashboardController.cs b/Webzine.WebApplication/Areas/Administration/Controllers/DashboardController.cs
index 97f1721..79a5d6b 100644
--- a/Webzine.WebApplication/Areas/Administration/Controllers/DashboardController.cs
+++ b/Webzine.WebApplication/Areas/Administration/Controllers/DashboardController.cs
@@ -1,9 +1,9 @@
 namespace Webzine.WebApplication.Areas.Administration.Controllers;
 
+using Microsoft.AspNetCore.Mvc;
+
 using Webzine.Business.Contracts;
 using Webzine.Business.Contracts.Dto;
-using Microsoft.AspNetCore.Mvc;
-using Webzine.Repository.Contracts;
 
 [Area("Administration")]
 public class DashboardController : Controller
@@ -31,7 +31,7 @@ public class DashboardController : Controller
     /// <returns>La vue Index du tableau de bord.</returns>
     public IActionResult Index()
     {
-        DashboardDTO data = dashboardService.GetDashboardData();
+        DashboardDTO data = this.dashboardService.GetDashboardData();
 
         return this.View(data);
     }
diff --git a/Webzine.WebApplication/Areas/Administration/ViewModels/Artiste/ArtisteCreateViewModel.cs b/Webzine.WebApplication/Areas/Administration/ViewModels/Artiste/ArtisteCreateViewModel.cs
index bdb43de..68dedd6 100644
--- a/Webzine.WebApplication/Areas/Administration/ViewModels/Artiste/ArtisteCreateViewModel.cs
+++ b/Webzine.WebApplication/Areas/Administration/ViewModels/Artiste/ArtisteCreateViewModel.cs
@@ -10,12 +10,15 @@
         /// <summary>
         /// Nom de l'artiste.
         /// </summary>
-        [Required]
+        [Required(ErrorMessage = "Le nom de l'auteur est obligatoire.")]
+        [StringLength(50, ErrorMessage = "Le nom ne doit pas dépasser 50 caractères.")]
         public string Nom { get; set; }
 
         /// <summary>
         /// Biographie de l'artiste.
-        /// </summary>
+        /// </summary>*
+        [Required(ErrorMessage = "La biographie ne peux pas etre vide.")]
+
         public string Biographie { get; set; }
     }
 }
\ No newline at end of file
diff --git a/Webzine.WebApplication/Areas/Administration/ViewModels/Artiste/ArtisteEditViewModel.cs b/Webzine.WebApplication/Areas/Administration/ViewModels/Artiste/ArtisteEditViewModel.cs
index bf2d503..0d34c6f 100644
--- a/Webzine.WebApplication/Areas/Administration/ViewModels/Artiste/ArtisteEditViewModel.cs
+++ b/Webzine.WebApplication/Areas/Administration/ViewModels/Artiste/ArtisteEditViewModel.cs
@@ -16,12 +16,15 @@
         /// <summary>
         /// Nom de l'artiste.
         /// </summary>
-        [Required]
+        [Required(ErrorMessage = "Le nom de l'auteur est obligatoire.")]
+        [StringLength(50, ErrorMessage = "Le nom ne doit pas dépasser 50 caractères.")]
+
         public string Nom { get; set; }
 
         /// <summary>
         /// Biographie de l'artiste.
         /// </summary>
+        [Required(ErrorMessage = "Le contenu de la biographie ne peut pas être vide.")]
         public string Biographie { get; set; }
     }
 }
\ No newline at end of file
diff --git a/Webzine.WebApplication/Areas/Administration/ViewModels/Styles/StyleCreateViewModel.cs b/Webzine.WebApplication/Areas/Administration/ViewModels/Styles/StyleCreateViewModel.cs
index 86abbde..2eba907 100644
--- a/Webzine.WebApplication/Areas/Administration/ViewModels/Styles/StyleCreateViewModel.cs
+++ b/Webzine.WebApplication/Areas/Administration/ViewModels/Styles/StyleCreateViewModel.cs
@@ -14,7 +14,7 @@ namespace Webzine.WebApplication.Areas.Administration.ViewModels.Style
         /// <summary>
         /// Obtient ou définit le libellé du style.
         /// </summary>
-        [Required]
+        [Required(ErrorMessage = "Le libelle du style est obligatoire.")]
         public string Libelle { get; set; }
     }
 }
\ No newline at end of file
diff --git a/Webzine.WebApplication/Areas/Administration/ViewModels/Styles/StyleEditViewModel.cs b/Webzine.WebApplication/Areas/Administration/ViewModels/Styles/StyleEditViewModel.cs
index 093c130..671098c 100644
--- a/Webzine.WebApplication/Areas/Administration/ViewModels/Styles/StyleEditViewModel.cs
+++ b/Webzine.WebApplication/Areas/Administration/ViewModels/Styles/StyleEditViewModel.cs
@@ -19,7 +19,7 @@ namespace Webzine.WebApplication.Areas.Administration.ViewModels.Style
         /// <summary>
         /// Obtient ou definit le libelle du style.
         /// </summary>
-        [Required]
+        [Required(ErrorMessage = "Le libelle du style est obligatoire.")]
         public string Libelle { get; set; }
     }
 }
\ No newline at end of file
diff --git a/Webzine.WebApplication/Areas/Administration/Views/Artiste/Create.cshtml b/Webzine.WebApplication/Areas/Administration/Views/Artiste/Create.cshtml
index 38f842b..b9dc4ca 100644
--- a/Webzine.WebApplication/Areas/Administration/Views/Artiste/Create.cshtml
+++ b/Webzine.WebApplication/Areas/Administration/Views/Artiste/Create.cshtml
@@ -11,6 +11,8 @@
             <label class="col-md-3 col-form-label">Nom de l'artiste<span class="text-danger">*</span></label>
             <div class="col-md-9">
                 <input asp-for="Nom" class="form-control" />
+                <span asp-validation-for="Nom" class="text-danger"></span>
+
             </div>
         </div>
 
@@ -19,6 +21,8 @@
             <label class="col-md-3 col-form-label">Biographie</label>
             <div class="col-md-9">
                 <textarea asp-for="Biographie" class="form-control" rows="5"></textarea>
+                <span asp-validation-for="Biographie" class="text-danger"></span>
+
             </div>
         </div>
 
diff --git a/Webzine.WebApplication/Areas/Administration/Views/Artiste/_Form.cshtml b/Webzine.WebApplication/Areas/Administration/Views/Artiste/_Form.cshtml
index 960ad3f..c7fbf2e 100644
--- a/Webzine.WebApplication/Areas/Administration/Views/Artiste/_Form.cshtml
+++ b/Webzine.WebApplication/Areas/Administration/Views/Artiste/_Form.cshtml
@@ -6,6 +6,8 @@
         <label class="col-md-3 col-form-label">Nom de l'artiste<span class="text-danger">*</span></label>
         <div class="col-md-9">
             <input asp-for="Nom" class="form-control" />
+            <span asp-validation-for="Nom" class="text-danger"></span>
+
         </div>
     </div>
 
@@ -14,7 +16,10 @@
         <label class="col-md-3 col-form-label">Biographie</label>
         <div class="col-md-9">
             <textarea asp-for="Biographie" class="form-control" rows="5"></textarea>
+            <span asp-validation-for="Biographie" class="text-danger"></span>
+
         </div>
+
     </div>
 
     <!-- BOUTONS -->
diff --git a/Webzine.WebApplication/Controllers/TitreController.cs b/Webzine.WebApplication/Controllers/TitreController.cs
index 384f41e..a741043 100644
--- a/Webzine.WebApplication/Controllers/TitreController.cs
+++ b/Webzine.WebApplication/Controllers/TitreController.cs
@@ -39,7 +39,6 @@ namespace Webzine.WebApplication.Controllers
         /// </summary>
         /// <param name="id">Identifiant du titre.</param>
         /// <returns>Vue des details ou 404 si introuvable.</returns>
-
         public IActionResult Index(int id)
         {
             this.logger.LogInformation("Demande d'affichage du detail pour le titre ID {Id}.", id);
diff --git a/Webzine.WebApplication/Extensions/RouteConfiguration.cs b/Webzine.WebApplication/Extensions/RouteConfiguration.cs
index d7f43b8..0b9b428 100644
--- a/Webzine.WebApplication/Extensions/RouteConfiguration.cs
+++ b/Webzine.WebApplication/Extensions/RouteConfiguration.cs
@@ -23,9 +23,7 @@ public static class RouteConfiguration
             pattern: "artiste/{nom}",
             defaults: new { controller = "Artiste", action = "Index" });
 
-
         // ----------- ADMIN -----------
-
         var adminRoutes = new Dictionary<string, string>
         {
             { "artistes", "Artiste" }, { "commentaires", "Commentaire" }, { "styles", "Style" }, { "titres", "Titre" },
@@ -39,9 +37,7 @@ public static class RouteConfiguration
                 defaults: new { area = "Administration", controller = route.Value, action = "Index" });
         }
 
-
         // --- AUTRE PROUTES ---
-
         endpoints.MapControllerRoute(
             name: "areas",
             pattern: "{area:exists}/{controller=Home}/{action=Index}/{id?}");