Hi, I have a connection leak in my web application which can be identified as this code - which looks quite innocent to me. What am I missing?

I can reproduce the problem when I set Max Pool Size to a small number.

 using (var reader = (SqlDataReader) dao.GetAsDataReader(null, fields, filter1, relations1,
                                CommandBehavior.Default, 0, true))
                            {
                                while (reader.Read())
                                {
                                    AnnotationCode ac1 = new AnnotationCode();
                                    ac1.Value = reader.GetInt64(0);
                                    ac1.Name = reader.GetString(1);
                                    a.AvailableOptions.Add(ac1);
                                }
                                reader.Close();
                            }

I Played around with reader.close() but no change. Shouldnt IDisposable / using() release the connection?

LLBLGEN 5.2.3, .net 4.7 (ASP.Net MVC5), SQL Server 2016

Never mind, now I look at the code here in the forum,

CommandBehavior.CloseConnection ...

Regards erwin