<p>I'm creating an asp.net app with just some lite data access from xml files.  However, I need to be able to authenticate administrative users (via forms) to manage that data.  I don't want to stand up a sql db just for authentication purposes.  I'd like to use xml, but not sure about security with that.  Any suggestions?  Custom role provider?  MyOpenID?</p>

```
```
int number;

do
{
    Console.WriteLine("Guess a number between 20 through 25");
    number = int.Parse(Console.ReadLine());
} while (number < 25);

if (number == 25)
    Console.WriteLine("Merry Christmas");
```
```