[Solved] How to edit collection in cell

[Beast]

Hi
I need to edit orders collection in cell. How can i do it? My models like below and i use ajax binding.
public class Customer

{

    public Customer()

    {

       this.Orders=new List<Order>();

    }

    public string Name {get;set;}

    public List<Order> Orders{get;set;}

}

public class Order

{

    public string Product{get;set;}

    public int Count{get;set;}

}

thanks