Custom Middleware

Startup.cs

 public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseCustomLoggerMiddleware();

            app.Run(async (context) =>
            {
                await context.Response.Body.WriteAsync(Encoding.ASCII.GetBytes("This is called from Configure() method response"));
            });
        }