Question

public class Order
{
    public int Id;
    public string CustomerName;
    public DateTime OrderDate;
    public List<OrderLine> Lines;
}

public class OrderLine
{
    public decimal Quantity;
    public decimal UnitPrice;
    public Product Product;
}

public class Product
{
    public int Id;
    public string Name;
    public decimal DefaultUnitPrice;
}

I’m getting pretty confused as how to do this query, I’m trying to display the CustomerName ascending, depending on the total of the orders.
Thanks in advance.

Answer 1

(from o in orders
    select new {
    o.CustomerName, 
    Total = o.Lines.Sum(x=>x.UnitPrice*x.Quantity)}
    ).OrderBy(x=>x.CustomerName).ThenBy(x=>x.Total);;

Edit: fixed total sum