Saving changes a player has made to the world?!?!?

I'm currently working on a city builder game in C#, and am looking for a way of saving changes that a player has made to the world, for example, placed buildings as well as the players progress, for example, the amount of resources the player currently has. To see the kind game I'm talking about go to my blog (http://www.jwgames.tumblr.com)

I've done a bit of research into it, and I keep on finding links to premade saving solutions, but the links always takes me to empty websites. If any one can help, it would be massively appreciated :)

Thanks

-Joseph