Getting 'System.InvalidOperationException' When Using Entity Framework Core with 'AsNoTracking' in .NET 7
I've been struggling with this for a few days now and could really use some help... I've looked through the documentation and I'm still confused about Quick question that's been bugging me - I'm working with a `System.InvalidOperationException` when trying to use `AsNoTracking()` with Entity Framework Core in my .NET 7 application..... The behavior message I'm getting is: `The instance of entity type 'MyEntity' want to be tracked because another instance with the same key value for {'Id'} is already being tracked.` This occurs when I attempt to retrieve multiple entities from the database without tracking them, but later, when I try to update one of these entities, I receive the exception. Here’s a snippet of my code where I fetch the entities: ```csharp public async Task<List<MyEntity>> GetEntitiesAsync() { using (var context = new MyDbContext()) { return await context.MyEntities.AsNoTracking().ToListAsync(); } } ``` After fetching the entities, I modify one of them: ```csharp public async Task UpdateEntityAsync(MyEntity entity) { using (var context = new MyDbContext()) { context.MyEntities.Update(entity); await context.SaveChangesAsync(); } } ``` The scenario arises when I call `UpdateEntityAsync()` with an entity that I retrieved using `GetEntitiesAsync()`. I’ve read that using `AsNoTracking()` should prevent the tracking behavior, but it seems that the entity is somehow still being tracked. I've also tried detaching the entity before updating it with `context.Entry(entity).State = EntityState.Detached;`, but that didn’t resolve the scenario either. Can anyone help clarify how to properly use `AsNoTracking()` in this scenario, or suggest a workaround to avoid the `InvalidOperationException`? My development environment is Ubuntu. Is there a better approach? For context: I'm using C# on Linux. Is there a better approach?