essaie de solution

Sources/MyFirstBlazor/Pages/List.razor

@@ -27,3 +27,8 @@
     </DataGridColumn>
     <DataGridColumn TItem="Item" Field="@nameof(Item.CreatedDate)" Caption="Created date" DisplayFormat="{0:d}" DisplayFormatProvider="@System.Globalization.CultureInfo.GetCultureInfo("fr-FR")" />
 </DataGrid>
+
+@code{
+    @using MyFirstBlazor.Models;
+    private List<Item>? items;
+}