using (MySqlConnection connection = new MySqlConnection("Server=..., Database=...; Uid=...; Pwd=..."))
{
    connection.Open();
    using (MySqlCommand command = connection.CreateCommand())
    {
        command.CommandText = "SELECT posts.post, ...";
        using (MySqlDataReader reader = command.ExecuteReader())
        {
             while (reader.Read())
             {
                  string content = (string)reader[0];
                  // Und hier kann ich im Debugger schon %1/2 etc. sehen
             }
        }
    }
}