Error Handling in ASP.NET Core with Middleware: Unexpected Result with Exception Filter
I'm working on an ASP.NET Core 6 application where I have implemented a global exception filter to handle errors uniformly across my API. However, I'm encountering unexpected behavior when I throw an exception in my controller action. The exception filter is not being triggered as expected, leading to an unhandled exception result in the response. Here’s a simplified version of what I have: ```csharp public class CustomExceptionFilter : IExceptionFilter { public void OnException(ExceptionContext context) { context.Result = new ObjectResult(new { Error = context.Exception.Message, StatusCode = 500 }) { StatusCode = 500 }; context.ExceptionHandled = true; } } ``` I've registered this filter globally in the `Startup.cs`: ```csharp public void ConfigureServices(IServiceCollection services) { services.AddControllers(options => { options.Filters.Add<CustomExceptionFilter>(); }); } ``` And in my controller, I have an action that intentionally throws an exception: ```csharp [ApiController] [Route("api/[controller]"] public class SampleController : ControllerBase { [HttpGet] public IActionResult Get() { throw new InvalidOperationException("Test exception"); } } ``` When I access this endpoint, instead of the expected JSON error response, I receive a plain text error with a status code 500. I've verified that other parts of the application are set up correctly for JSON responses. I’ve also ensured that the middleware for exception handling is properly ordered in the `Configure` method. Here’s how I have it: ```csharp public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } app.UseRouting(); app.UseAuthorization(); app.UseEndpoints(endpoints => { endpoints.MapControllers(); }); } ``` I've tried changing the order of the middleware and different configurations, but the exception filter still does not seem to catch exceptions thrown in the controller. Is there something I'm missing or a specific configuration that needs to be set for the exception filter to work properly? Any insights would be appreciated. This is part of a larger API I'm building. I'd really appreciate any guidance on this.