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Unexpected 'InvalidOperationException' When Using LINQ to Query Entity Framework Core DbSet in .NET 7

👀 Views: 2 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-11
c# entity-framework-core dotnet linq C#

I'm refactoring my project and After trying multiple solutions online, I still can't figure this out. Quick question that's been bugging me - I'm working with an `InvalidOperationException` when attempting to use LINQ to query a `DbSet` in my .NET 7 application that uses Entity Framework Core. The behavior message states `The operation want to be completed because the DbContext has been disposed`. The scenario occurs in a function that retrieves data from the database, and I suspect it has to do with how I manage the scope of my `DbContext`. Here's the relevant code snippet: ```csharp public class MyService { private readonly MyDbContext _context; public MyService(MyDbContext context) { _context = context; } public async Task<List<MyEntity>> GetEntitiesAsync() { var entities = await _context.MyEntities.ToListAsync(); return entities; } } ``` This service is injected into a controller, but I noticed that if I try to access the result of `GetEntitiesAsync()` after the request completes, I get the `InvalidOperationException`. To isolate the scenario, I've tried the following: 1. Ensured that the `DbContext` is scoped correctly in the `Startup.cs` file: ```csharp services.AddDbContext<MyDbContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"))); ``` 2. I verified that I'm not holding onto the `DbContext` beyond the lifetime of the HTTP request. However, it seems like the LINQ query attempts to execute after the context is disposed. What could be causing this behavior? Is there a way to ensure that the `DbContext` stays alive during the entire operation, or should I structure my queries differently? Any guidance would be greatly appreciated! Any help would be greatly appreciated! Thanks in advance!