trying to incorporate saving and loading of sessions

[vincegrear]

I'm creating a desktop application using visual studio express 2012, and I'm trying to make it possible for the user to save their session, and then load it again after the program has been re-opened. I learned about the propertybag object, but when I type public propertybag1 as new propertybag, it says type propertybag is not defined. I also tried to import certain references to get it to work, but without any luck. Is there someway I can use the propertybag object, or is there an alternative and easy way of preserving and loading data between instances? Thanks for any suggestions.