Fix vari

salesbook.Shared/Core/Interface/IManageDataService.cs

@@ -13,6 +13,7 @@ public interface IManageDataService
     Task<ContactDTO?> GetSpecificContact(string codAnag, bool IsContact);
 
     Task InsertOrUpdate<T>(T objectToSave);
+    Task InsertOrUpdate<T>(List<T> listToSave);
 
     Task Delete<T>(T objectToDelete);
     Task DeleteActivity(ActivityDTO activity);