Using Entity Framework Core with PostgreSQL - How to Handle Concurrency Conflicts Gracefully?
This might be a silly question, but I'm stuck on something that should probably be simple. I'm currently implementing a .NET 6 application using Entity Framework Core to interact with a PostgreSQL database. I've run into an issue where I'm trying to handle concurrency conflicts when multiple users attempt to update the same record concurrently. I've set up optimistic concurrency by adding a `RowVersion` property to my entity class, but I'm not sure how to gracefully manage the `DbUpdateConcurrencyException` that gets thrown when a conflict occurs. Here's an example of my entity model: ```csharp public class Product { public int Id { get; set; } public string Name { get; set; } public decimal Price { get; set; } [Timestamp] public byte[] RowVersion { get; set; } } ``` When I try to update a product that has already been modified by another user, I receive this exception: ``` DbUpdateConcurrencyException: The database operation was expected to affect 1 row(s) but actually affected 0 row(s). The database may have been changed by another user. ``` I've tried wrapping my update logic in a try-catch block, and I can catch the exception, but I don't know the best way to inform the user that their changes couldn't be saved. Here's a snippet of my update method: ```csharp public async Task<bool> UpdateProductAsync(Product product) { try { _context.Products.Update(product); await _context.SaveChangesAsync(); return true; } catch (DbUpdateConcurrencyException ex) { // What should I do here? return false; } } ``` My goal is to provide a user-friendly message that informs them of the issue and perhaps offer options to reload the data or overwrite the current changes. What's the recommended approach for handling this situation in a .NET 6 application using EF Core? Any best practices or patterns would be greatly appreciated. For reference, this is a production desktop app. For reference, this is a production application. This is happening in both development and production on Windows 10. What would be the recommended way to handle this?