Program.cs

varbuilder=WebApplication.CreateBuilder();
builder.Services.AddTransient<TerminalMiddleware>();

varapp=builder.Build();
app.UseMiddleware(typeof(TerminalMiddleware));
app.Run();

publicclassTerminalMiddleware:IMiddleware
{
ILogger<TerminalMiddleware>_log;

DateTime_date=DateTime.Now;

publicTerminalMiddleware(ILogger<TerminalMiddleware>log)
{
_log=log;
}

publicasyncTaskInvokeAsync(HttpContextcontext,RequestDelegatenext)
{
_log.LogDebug($"Request: {context.Request.Path}");
context.Response.Headers.Append("Content-Type","text/plain");
awaitcontext.Response.WriteAsync($"This Middleware is transient. Keep refreshing your page. The date will keep changing: {_date}.");
}
}