Issue with Lazy Loading Navigation Properties in EF Core 6 - Getting Null Reference Exception
After trying multiple solutions online, I still can't figure this out. I'm facing a `NullReferenceException` when trying to access a navigation property of an entity retrieved from my database using Entity Framework Core 6. I have a `User` entity that has a lazy-loaded navigation property `Profile`. The `Profile` property is configured to be lazy-loaded, but it seems to be returning `null` when accessed, which leads to exceptions in my application. Here’s my setup: ```csharp public class User { public int Id { get; set; } public string Name { get; set; } public virtual Profile Profile { get; set; } // Lazy-loaded navigation property } public class Profile { public int Id { get; set; } public string Bio { get; set; } public int UserId { get; set; } public virtual User User { get; set; } } ``` I'm using the following query to retrieve a user: ```csharp var user = await _context.Users.FindAsync(userId); if (user != null) { var bio = user.Profile.Bio; // This line throws NullReferenceException } ``` I’ve ensured that the `Profile` data exists in the database for the user in question. I've also tried explicitly loading the `Profile` using `Include`, like this: ```csharp var user = await _context.Users.Include(u => u.Profile).FirstOrDefaultAsync(u => u.Id == userId); ``` However, I still get `null` for the `Profile` property in some cases. I have checked that lazy loading is enabled in my `DbContext` constructor as follows: ```csharp protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { optionsBuilder.UseLazyLoadingProxies(); } ``` Could there be a specific reason why the `Profile` property is not being populated as expected? I'm also unsure if there's a configuration I've missed that could be impacting this behavior. Any insights would be greatly appreciated!