C# 11: Custom handling Handling with Middleware Not Propagating Errors as Expected
I can't seem to get Could someone explain I'm building a feature where I just started working with I'm currently implementing a custom exception handling middleware in an ASP.NET Core 7 application, but it seems that my middleware is not propagating exceptions correctly to the global exception handler... Instead, the application just returns a 500 Internal Server behavior without my custom behavior response formatting.\n\nHere’s a simplified version of my middleware: \n```csharp\npublic class ExceptionHandlingMiddleware \n{ \n private readonly RequestDelegate _next; \n public ExceptionHandlingMiddleware(RequestDelegate next) \n { \n _next = next; \n } \n public async Task InvokeAsync(HttpContext context) \n { \n try \n { \n await _next(context); \n } \n catch (Exception ex) \n { \n await HandleExceptionAsync(context, ex); \n } \n } \n private Task HandleExceptionAsync(HttpContext context, Exception ex) \n { \n context.Response.ContentType = "application/json"; \n context.Response.StatusCode = (int)HttpStatusCode.InternalServerError; \n var result = JsonSerializer.Serialize(new { message = ex.Message }); \n return context.Response.WriteAsync(result); \n } \n} \n```\nI’ve registered the middleware in `Startup.cs` like this: \n```csharp\npublic void Configure(IApplicationBuilder app, IWebHostEnvironment env) \n{ \n app.UseMiddleware<ExceptionHandlingMiddleware>(); \n // other middleware \n app.UseEndpoints(endpoints => \n { \n endpoints.MapControllers(); \n }); \n} \n```\nHowever, when I throw an exception in one of my controller actions, for example: \n```csharp\n[HttpGet] \npublic IActionResult Get() \n{ \n throw new InvalidOperationException("This is a test exception"); \n} \n```\nI receive the default 500 behavior without my custom message. I’ve confirmed that my middleware is being hit by adding a log statement in the `InvokeAsync` method. \nI suspect that the behavior is being caught by some other middleware or that the exception is being handled elsewhere. I've checked the order of middleware registration but still can’t find the scenario. Any insights on what could be going wrong or how to ensure my custom middleware handles the exceptions as intended? For context: I'm using C# on Linux. Has anyone else encountered this? What are your experiences with this? Any ideas how to fix this? I'm using C# 3.9 in this project.