LINQ Query with Conditional Joins Returning Unexpected Results in C#
Hey everyone, I'm running into an issue that's driving me crazy... I'm stuck trying to I'm sure I'm missing something obvious here, but I'm working with two collections in C# and trying to join them using LINQ based on a conditional logic, but I'm getting unexpected results..... I have a list of `Orders` and a list of `Customers`, and I want to join these lists such that I only get orders from customers who are active. However, the LINQ query is returning orders from inactive customers as well. Here are the relevant classes: ```csharp public class Order { public int OrderId { get; set; } public int CustomerId { get; set; } public decimal TotalAmount { get; set; } } public class Customer { public int CustomerId { get; set; } public string Name { get; set; } public bool IsActive { get; set; } } ``` I have the following lists: ```csharp List<Order> orders = new List<Order> { new Order { OrderId = 1, CustomerId = 1, TotalAmount = 100 }, new Order { OrderId = 2, CustomerId = 2, TotalAmount = 200 }, new Order { OrderId = 3, CustomerId = 3, TotalAmount = 300 } }; List<Customer> customers = new List<Customer> { new Customer { CustomerId = 1, Name = "Alice", IsActive = true }, new Customer { CustomerId = 2, Name = "Bob", IsActive = false }, new Customer { CustomerId = 3, Name = "Charlie", IsActive = true } }; ``` And here is my LINQ query: ```csharp var result = from order in orders join customer in customers on order.CustomerId equals customer.CustomerId where customer.IsActive select new { order.OrderId, customer.Name, order.TotalAmount }; ``` Despite the conditional filtering by `IsActive`, the result still includes orders from inactive customers. I've tried checking if the `IsActive` property is set correctly, and everything seems fine. I also tried switching to method syntax: ```csharp var result = orders.Join(customers, order => order.CustomerId, customer => customer.CustomerId, (order, customer) => new { order, customer }) .Where(joined => joined.customer.IsActive) .Select(joined => new { joined.order.OrderId, joined.customer.Name, joined.order.TotalAmount }); ``` But I continue to receive orders from inactive customers. Is there something Iām missing or a common pitfall with conditional joins in LINQ? Any insights would be appreciated! How would you solve this? I'm coming from a different tech stack and learning Csharp. What am I doing wrong? I recently upgraded to Csharp latest. Any feedback is welcome!