If statement is true but code doesn't execute C#

while (reader.Read())
                        {
                            //do something


                           if (reader[0] != null)
                            {
                                if (reader[0] == (email))
                                {
                                    Console.WriteLine("ok");
                                    reader.Close();
                                    con.Close();
                                    return true;
                                }
                            }
                        }

this statement if (reader[0] == (email)) shows true but doesn't execute the code