我想将订单通过客户ID分组,然后将返回的订单(按客户)投影到列表中。您知道我该如何做吗?
List<OrderGroup> set = OrderRepository.GetAllOrders
.GroupBy(x => x.CustomerId).Select(result => new OrderGroup
{
Orders = ???? //should be all orders from one customer.
}).ToList();