bool show_classroom_link = false;
string s = "abcdefg";
Console.WriteLine(s.IndexOf("fg"));
Console.WriteLine(s.IndexOf("b"));
Console.WriteLine(s.IndexOf("z"));
show_classroom_link = (Convert.ToInt32(emp_rs["classroom_program_count"]) > 0) || (emp_rs["security_group_list"].ToString().IndexOf(",14,") + 1 > 0);
emp_rs.Close();
emp_rs = null;