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Issues with Lazy Loading in Entity Framework Core 6 and Related Object State Management

πŸ‘€ Views: 12 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-07
entity-framework-core lazy-loading csharp

I just started working with I'm not sure how to approach Quick question that's been bugging me - I've looked through the documentation and I'm still confused about I've searched everywhere and can't find a clear answer. I'm encountering an issue with lazy loading in Entity Framework Core 6 where related entities don’t seem to load as expected when accessed after the context is disposed. I have a simple domain model with `Blog` and `Post` entities, where each `Blog` can have multiple `Post` entities. Here's the relevant code snippet: ```csharp public class Blog { public int BlogId { get; set; } public string Url { get; set; } public virtual ICollection<Post> Posts { get; set; } } public class Post { public int PostId { get; set; } public string Title { get; set; } public string Content { get; set; } public int BlogId { get; set; } public virtual Blog Blog { get; set; } } ``` I have configured my `DbContext` as follows, enabling lazy loading: ```csharp public class BloggingContext : DbContext { public BloggingContext(DbContextOptions<BloggingContext> options) : base(options) { } public DbSet<Blog> Blogs { get; set; } public DbSet<Post> Posts { get; set; } protected override void OnModelCreating(ModelBuilder modelBuilder) { modelBuilder.Entity<Blog>().ToTable("Blogs"); modelBuilder.Entity<Post>().ToTable("Posts"); } } ``` When I try to access the `Posts` collection of a `Blog` after the context has been disposed, I get the following exception: ``` System.ObjectDisposedException: The DbContext has been disposed and cannot be used for lazy loading. ``` I tried keeping the context alive longer, but that seems to defeat the purpose of using `DbContext`’s lifecycle management. I also ensured that I have included `services.AddDbContext<BloggingContext>(options => options.UseLazyLoadingProxies())` in my `Startup.cs`. Is there a recommended pattern or best practice for accessing related data without encountering this issue? I’ve also considered using eager loading or explicit loading, but I’m unsure what impact that would have on performance in this scenario. Any guidance or insights would be greatly appreciated! Is there a better approach? Any help would be greatly appreciated! I'm working on a CLI tool that needs to handle this. Am I missing something obvious? I appreciate any insights!