How to access Content of a ComboBox.ItemElements?

Question

I'm stuck in accessing the Content of comboBox.ItemElements which is as enter code herehighlighted below. I'm unable to figure out what is the probable reason.

If I copy the expression in debug view this is how it is:

  ((ArtOfTest.WebAii.Silverlight.UI.ContentControl)new System.Collections.Generic.Mscorlib_CollectionDebugView<Telerik.WebAii.Controls.Xaml.IRadComboBoxItem>(comboBox.ItemElements).Items[0]).Content 
    "Thickness"

Here is what I'm trying to do: var itemContent = comboBox.ItemElements.Content
Could anyone please suggest?