using code snippets for samples

Author: rainsxng

docs/core/extensions/httpclient-latency-extensions.md

@@ -91,17 +91,7 @@ For more information, see [dotnet package add](../tools/dotnet-package-add.md) o
 
 To add HTTP client latency telemetry to your application, call the <xref:Microsoft.Extensions.DependencyInjection.HttpClientLatencyTelemetryExtensions.AddHttpClientLatencyTelemetry*> extension method when configuring your services:
 
-```csharp
-using Microsoft.Extensions.DependencyInjection;
-
-var builder = WebApplication.CreateBuilder(args);
-
-// Add HTTP client factory
-builder.Services.AddHttpClient();
-
-// Add HTTP client latency telemetry
-builder.Services.AddHttpClientLatencyTelemetry();
-```
+:::code language="csharp" source="snippets/http/latency/Program.Extensions.cs" id="extensions":::
 
 This registration adds a `DelegatingHandler` to all HTTP clients created through <xref:System.Net.Http.IHttpClientFactory>, collecting detailed latency information for each request.
 

docs/core/extensions/snippets/http/latency/Program.Extensions.cs

@@ -0,0 +1,20 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Http.Diagnostics;
+
+
+internal partial class Program
+{
+    private static void ConfigureHttpClientLatency(HostApplicationBuilder builder)
+    {
+        // <extensions>
+        var builder = WebApplication.CreateBuilder(args);
+
+		// Add HTTP client factory
+		builder.Services.AddHttpClient();
+
+		// Add HTTP client latency telemetry
+		builder.Services.AddHttpClientLatencyTelemetry();
+        // </extensions>
+    }
+}

docs/core/extensions/snippets/http/latency/latency.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>true</ImplicitUsings>
+    <OutputType>Exe</OutputType>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Remove="appsettings.json" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="appsettings.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Http.Diagnostics" Version="9.10.0" />
+  </ItemGroup>
+
+</Project>