diff --git a/EPAServeur/Attributes/CannotBeEmptyAttribute.cs b/EPAServeur/Attributes/CannotBeEmptyAttribute.cs
new file mode 100644
index 0000000..b785ba1
--- /dev/null
+++ b/EPAServeur/Attributes/CannotBeEmptyAttribute.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections;
+using System.ComponentModel.DataAnnotations;
+
+namespace EPAServeur.Attributes
+{
+    /// <summary>
+    /// Specifies that a collection of a specified type must have at least one element.
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter, AllowMultiple = false)]
+    public sealed class CannotBeEmptyAttribute : RequiredAttribute
+    {
+        public override bool IsValid(object value)
+        {
+            var list = value as IEnumerable;
+            return list != null && list.GetEnumerator().MoveNext();
+        }
+    }
+}