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Home/ Questions/Q 6129701
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Editorial Team
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Editorial Team
Asked: May 23, 20262026-05-23T16:46:24+00:00 2026-05-23T16:46:24+00:00

I have following structure: public class Customer { public int ID { get; set;

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I have following structure:

public class Customer
{
  public int ID { get; set; }
  public List<Order> Orders { get; set; }
}

public class Order
{
  public int ID { get; set; }
  public int ProductID { get set; }
}

I need to get the collection of customers that ordered ProductID = 6. What would the fluent style LINQ look like?

I tried below with no luck:

var customers = allCustomers.SelectMany(c => c.Orders.Select(o => o.ProductID.Equals(6))).ToArray();
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  1. Editorial Team
    Editorial Team
    2026-05-23T16:46:25+00:00Added an answer on May 23, 2026 at 4:46 pm

    var customers = allCustomers.Where(c => c.Orders.Any(o => o.ProductID == 6));

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