title: Store data permanently without a database
body: <p>I'm implementing a C# application that needs to save 10 IP addresses in it. So i think it is resource wasting if I integrate a database in to the application. I cannot use XML or text file because those addresses needs to be secure. I sow a suggestion to implement my own file format and use it.<br>1. Is there any suggestion instead implement separate file format<br>2.if there isn't any how to implement new file format and what is the best </p>