diff --git a/core/diagnostics/DiagnosticScenarios/DiagnosticScenarios.csproj b/core/diagnostics/DiagnosticScenarios/DiagnosticScenarios.csproj
index e7c303b758e..36e7b419d29 100644
--- a/core/diagnostics/DiagnosticScenarios/DiagnosticScenarios.csproj
+++ b/core/diagnostics/DiagnosticScenarios/DiagnosticScenarios.csproj
@@ -1,11 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
-  <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="8.0.6" />
-  </ItemGroup>
-
 </Project>
diff --git a/core/diagnostics/DiagnosticScenarios/Program.cs b/core/diagnostics/DiagnosticScenarios/Program.cs
index 92e7964881f..7f813b3c07b 100644
--- a/core/diagnostics/DiagnosticScenarios/Program.cs
+++ b/core/diagnostics/DiagnosticScenarios/Program.cs
@@ -1,26 +1,10 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
+var builder = WebApplication.CreateBuilder(args);
+builder.Services.AddControllers();
 
-namespace DiagnosticScenarios
-{
-    public class Program
-    {
-        public static void Main(string[] args)
-        {
-            CreateHostBuilder(args).Build().Run();
-        }
+var app = builder.Build();
 
-        public static IHostBuilder CreateHostBuilder(string[] args) =>
-            Host.CreateDefaultBuilder(args)
-                .ConfigureWebHostDefaults(webBuilder =>
-                {
-                    webBuilder.UseStartup<Startup>();
-                });
-    }
-}
+app.UseHttpsRedirection();
+app.UseAuthorization();
+app.MapControllers();
+
+app.Run();
diff --git a/core/diagnostics/DiagnosticScenarios/Startup.cs b/core/diagnostics/DiagnosticScenarios/Startup.cs
deleted file mode 100644
index 299b7604095..00000000000
--- a/core/diagnostics/DiagnosticScenarios/Startup.cs
+++ /dev/null
@@ -1,57 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.HttpsPolicy;
-using Microsoft.AspNetCore.Mvc;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
-
-namespace DiagnosticScenarios
-{
-    public class Startup
-    {
-        public Startup(IConfiguration configuration)
-        {
-            Configuration = configuration;
-        }
-
-        public IConfiguration Configuration { get; }
-
-        // This method gets called by the runtime. Use this method to add services to the container.
-        public void ConfigureServices(IServiceCollection services)
-        {
-            services.AddControllers()
-                .AddNewtonsoftJson();
-        }
-
-        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
-        {
-            if (env.IsDevelopment())
-            {
-                app.UseDeveloperExceptionPage();
-            }
-            else
-            {
-                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
-                app.UseHsts();
-            }
-
-            app.UseHttpsRedirection();
-
-            app.UseRouting();
-
-            app.UseAuthorization();
-
-            app.UseEndpoints(endpoints =>
-            {
-                endpoints.MapControllers();
-            });
-        }
-    }
-}
diff --git a/core/diagnostics/DiagnosticScenarios/appsettings.Development.json b/core/diagnostics/DiagnosticScenarios/appsettings.Development.json
index e203e9407e7..0c208ae9181 100644
--- a/core/diagnostics/DiagnosticScenarios/appsettings.Development.json
+++ b/core/diagnostics/DiagnosticScenarios/appsettings.Development.json
@@ -1,9 +1,8 @@
 {
   "Logging": {
     "LogLevel": {
-      "Default": "Debug",
-      "System": "Information",
-      "Microsoft": "Information"
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
     }
   }
 }
diff --git a/core/diagnostics/DiagnosticScenarios/appsettings.json b/core/diagnostics/DiagnosticScenarios/appsettings.json
index d9d9a9bff6f..10f68b8c8b4 100644
--- a/core/diagnostics/DiagnosticScenarios/appsettings.json
+++ b/core/diagnostics/DiagnosticScenarios/appsettings.json
@@ -2,8 +2,7 @@
   "Logging": {
     "LogLevel": {
       "Default": "Information",
-      "Microsoft": "Warning",
-      "Microsoft.Hosting.Lifetime": "Information"
+      "Microsoft.AspNetCore": "Warning"
     }
   },
   "AllowedHosts": "*"