first push

ModelsLib/ContactModel.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ModelsLib
+{
+    public class ContactModel
+    {
+        [Required(ErrorMessage = "Le nom est obligatoire")]
+        public string Name { get; set; } = string.Empty;
+
+        public string Title { get; set; } = string.Empty;
+
+        [Required(ErrorMessage = "L'email est obligatoire")]
+        [EmailAddress(ErrorMessage = "Email invalide")]
+        public string Email { get; set; } = string.Empty;
+
+        [Required(ErrorMessage = "Le message est obligatoire")]
+        [MinLength(10, ErrorMessage = "Le message doit contenir au moins 10 caractères")]
+        public string Message { get; set; } = string.Empty;
+    }
+}