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ASP.NET Core Middleware Not Executing in Correct Order with Custom Middleware

👀 Views: 37 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-28
asp.net-core middleware logging C#

I'm trying to debug I'm having an scenario with my ASP.NET Core application where I have a custom middleware that needs to execute before a certain built-in middleware, but it seems to be executing out of order. I have added the custom middleware like this: ```csharp public class CustomMiddleware { private readonly RequestDelegate _next; public CustomMiddleware(RequestDelegate next) { _next = next; } public async Task InvokeAsync(HttpContext context) { // Custom logic here await _next(context); } } ``` And I'm registering it in the `Startup.Configure` method like so: ```csharp public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { app.UseMiddleware<CustomMiddleware>(); app.UseRouting(); app.UseAuthorization(); app.UseEndpoints(endpoints => { endpoints.MapControllers(); }); } ``` The question arises when the custom middleware is supposed to log requests before they reach the routing middleware, but it seems that my logging logic is not being executed properly. I suspect it's because of the ordering of middleware setup, but I need to pinpoint the exact reason. I've read that middleware is executed in the order it is registered, which is why I placed `UseMiddleware<CustomMiddleware>()` at the top. On debugging, the `InvokeAsync` method in `CustomMiddleware` is not being called at all, and I am getting a `404 Not Found` behavior when trying to access the endpoint. I also tried to move the logging logic directly within the controller just to see if it would work there, and it did, so I suspect the middleware configuration is the root of the scenario. Is there something I'm missing in setting up the pipeline, or is there a best practice for middleware that I should be following? Any help would be appreciated! Has anyone else encountered this?