How to call multiple value store in List?

Question

hello,My question is I have store 3 or more username and password in app.config file then this appsettings data i will store in list Then i will create one forloop to execute data one by one

list<strings>values=in this values i will store appsettings and with help of forloop i want to execute as for(int i=0;i<values.count;i++)
{
here i have some class which i want to connect as follows

connectionoptions conn=new connoptions();

conn.username=values(i);here i want to add 3 or more username at one to know the username while complie

conn.password=values(i) here i want to add 3 or more password at one .....and so on..

then here we can see add values(i) towards username and password it doing well i m or not tell me buddys how i add tellme guys.. i hope we understood i m trying..

Thanq!