Databinding Silverlight datagrid row details template

Question

Hello,

I have an objectmodel that has a class Item and ItemsManager which exposes a list of Items objects using Observablecollection Items

public class Item
{
   public Name {get;set;}
   public Description {get;set;}

}

public class ItemsManager:INotifyPropertyChanged
{

   public Observablecollection<Item> Items;
   public string ItemGroupInformation {get;set;}

   public void SetItemGroupInformation()
   {
      //Code to Set Item Group Information
   }
   .. /Code to handle Property Notification
   ..

}

I have a user control that has a datagrid that binds to the Observable collection Items

Now in the rowdetail template of the datagrid I need to display value from ItemGroupInformation property if ItemsManager class

How do I achieve this?

Thanks!