ASPNET Custom Middleware — Building Custom Middleware Components

DodaTech Updated 2026-06-28 1 min read

In this tutorial, you'll learn about ASPNET Middleware Custom. We cover key concepts, practical examples, and best practices to help you understand and apply this topic effectively.

Custom middleware in ASP.NET Core lets you inject logic into the request pipeline for cross-cutting concerns like logging, authentication, and request transformation.

public class RequestTimingMiddleware
{
    private readonly RequestDelegate _next;
    private readonly ILogger<RequestTimingMiddleware> _logger;

    public RequestTimingMiddleware(RequestDelegate next, ILogger<RequestTimingMiddleware> logger)
    {
        _next = next;
        _logger = logger;
    }

    public async Task InvokeAsync(HttpContext context)
    {
        var sw = Stopwatch.StartNew();
        await _next(context);
        sw.Stop();
        _logger.LogInformation("Request {Method} {Path} took {Duration}ms",
            context.Request.Method, context.Request.Path, sw.ElapsedMilliseconds);
    }
}

// Registration in Program.cs
// app.UseMiddleware<RequestTimingMiddleware>();

Custom middleware enables reusable request processing logic that runs for every request, keeping your controllers clean and focused on business logic.

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