C# - Accessing Linq Data In Telerik Grid ItemCreated Method?

I have a telerik grid bound to a Linq data object, however, I limit the fields returned:

<IQueryable>filter = data.Select(x => new {x.ID, x.Name, x.Age});

I would like to access these fields in the ItemCreated method of the grid:

protected void rgPeople_ItemCreated(object sender, GridItemEventArgs e)
{
Telerik.Web.UI.GridDataItem item = (GridDataItem)e.Item;
?????? Person = (???????)e.Item.DataItem;
}

What do I declare ?? as so that I can use:

String ID = Person.ID;

String Name = Person.Name; etc