How to create properties and collections at run time in C# (SilverLight)?

Hello,

I have to create the properties at run time in modal class and have to attach INotifyInterface to those columns. Also I have  to create the observable collections at run time and bind it to grid view.
I am really confused about how to achieve this functionality. Can  anyone please help me out on this?
If you explain it with sample application  then it will be really appreciated.

Thanks,
Asim Bagwan