I am using the following Linq query

from p in Product.Include("ProductDetails.Colors")
                    where p.ProductID.Equals(18)
                    select p;

And then using the result of this query to bind the GridView.

The productDetails are bind to the grid fine, but the Colors are not bind. To bind colors i am using <%# Eval("Colors.CategoryName") %>. Error is " Field or property with the name 'Colors.CategoryName' was not found on the selected data source."

But in a loop i am getting this fine.

foreach (ProductDetails proDet in pd.ProductDetails)
        {
            string bar = proDet.BarCode;
            string color = proDet.Colors.CategoryName;
}