@Mahwish: Hi, I think you'll find the answer to that in lessons 13, 14 and 15. Also, I had to stare at that class for a long time to really understand the relationships between the shape of the data, how it was deserialized into an object graph, and how that object graph was bound to. I recommend you spend a few hours just really looking at each line of code in the SampleDataSource.cs to see those connections so that you can begin to imagine how to tweak it for your own needs. That's the only way to really learn what's going on. Hope that helps!
i am using grid template for window store app development in which all data is bind with SampleDataSource.cs . How we can implement json in that. Means how we will bind it with our ROOT Object class and retrieve result from it .