Grabbing values from Expression.Blend.SampleData

I am trying to figure out how to grab a value from Expression.Blend.SampleData. If my id is equal to a drop down for example, I can grab it by doing this:

((Expression.Blend.SampleData.MyDatabase.something)(MyDropDown.SelectedIte开发者_开发问答m)).description;

I need some way to place my own value where (MyDropDown.SelectedItem) is. Visual studio wants me to convert it a "Expression.Blend.SampleData.MyDatabase.something" format. I have tried a few ways to do this but I have been unsuccessful.

Any Ideas?

EDIT

I am starting to think there is no way in Silverlight to do this

Like most answers I come up with, this was simple:

((Expression.Blend.SampleData.MyDatabase.MyMainCollection)(((object[])(Application.Current.Resources.Values))[0])).MyCollection[1].Description

The MyColleciton[1] will grab the item with an id value of 1.