C# - advanced patterns with LINQ Query on Entity Framework Core with Includes
I tried several approaches but none seem to work... I'm trying to implement I'm building a feature where After trying multiple solutions online, I still can't figure this out... I've looked through the documentation and I'm still confused about I am experiencing unexpected behavior when using LINQ to query data from my Entity Framework Core context. Specifically, I have an `Order` entity that includes a navigation property to `Customer`, and sometimes it seems that the `Customer` data is not being populated correctly when I use `Include`. Here is a simplified version of my code: ```csharp var orders = await _context.Orders .Include(o => o.Customer) .Where(o => o.Status == OrderStatus.Completed) .ToListAsync(); ``` I expected that every `Order` in the returned list would have the associated `Customer` populated, but I noticed that some of the `Customer` properties are null. I’ve checked the database, and the `Customer` records definitely exist for those orders. I've tried to use `AsNoTracking()` as well, thinking it might be a tracking scenario, but the question continues: ```csharp var orders = await _context.Orders .Include(o => o.Customer) .AsNoTracking() .Where(o => o.Status == OrderStatus.Completed) .ToListAsync(); ``` Additionally, I verified that lazy loading is disabled, which I believe is the correct configuration for this scenario. The relevant parts of my `DbContext` look like this: ```csharp protected override void OnModelCreating(ModelBuilder modelBuilder) { modelBuilder.Entity<Order>() .HasOne(o => o.Customer) .WithMany(c => c.Orders) .HasForeignKey(o => o.CustomerId); } ``` I'm using Entity Framework Core 5.0. Can anyone guide to understand why some `Customer` entities are not being included in the results? Is there a specific edge case or configuration that I might be missing? For context: I'm using C# on Linux. I'm developing on CentOS with C#. Any advice would be much appreciated. I'm working on a mobile app that needs to handle this. Thanks for any help you can provide! My team is using C# for this microservice. What are your experiences with this?