Generate timestamps for ICreated in EF Core

ICreated.cs

            foreach (var entityType in modelBuilder.Model.GetEntityTypes().Where(t => t.ClrType.Implements<ICreated>())) {
                var property = entityType.FindProperty(nameof(ICreated.Created));
                property.ValueGenerated = ValueGenerated.OnAdd;
                entityType.AddIndex(property);
                modelBuilder.Entity(entityType.ClrType).Property(property.ClrType, property.Name).HasDefaultValueSql("sysdatetimeoffset()");
            }