Unexpected 'InvalidOperationException' when using Entity Framework Core with Custom DbContext in .NET 7
I've been working on this all day and I tried several approaches but none seem to work. I'm working with an `InvalidOperationException` when trying to retrieve data using a custom `DbContext` in my .NET 7 application. The behavior message states: "The instance of entity type 'Product' want to be tracked because another instance with the same key value for {'Id'} is already being tracked." This happens when I attempt to load a product by its ID after fetching it in another part of my service. Here's a simplified version of my `DbContext` setup: ```csharp public class MyDbContext : DbContext { public DbSet<Product> Products { get; set; } protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { optionsBuilder.UseSqlServer("YourConnectionStringHere"); } } ``` In my service, I'm executing the following code: ```csharp public class ProductService { private readonly MyDbContext _context; public ProductService(MyDbContext context) { _context = context; } public Product GetProductById(int id) { return _context.Products.Find(id); } public void UpdateProduct(Product product) { // Some logic here that uses the product returned from GetProductById _context.Update(product); _context.SaveChanges(); } } ``` I create a new instance of `ProductService` and call `GetProductById` to retrieve a product. Later, I try to update it using the same service instance. However, it throws the aforementioned exception. Previously, I tried detaching the entity using `_context.Entry(product).State = EntityState.Detached;` before the update, but that approach didn’t resolve the scenario. Is there a better way to manage the state of entities in this case, or is there something I might be overlooking in the `DbContext` lifecycle management? Any guidance would be appreciated! Has anyone else encountered this? The stack includes C# and several other technologies.