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docs/WechatTenpayV3/Advanced_IHttpClientFactory.md

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+### 如何在 ASP.NET Core 中与 `IHttpClientFactory` 集成？
+
+---
+
+> 请先自行阅读：
+>
+> [《Microsoft Docs - 使用 IHttpClientFactory 实现复原 HTTP 请求》](https://docs.microsoft.com/zh-cn/dotnet/architecture/microservices/implement-resilient-applications/use-httpclientfactory-to-implement-resilient-http-requests)
+>
+> [《Microsoft Docs - 在 ASP.NET Core 中使用 IHttpClientFactory 发出 HTTP 请求》](https://docs.microsoft.com/zh-cn/aspnet/core/fundamentals/http-requests#httpclient-and-lifetime-management)
+
+你可以在构造得到 `WechatTenpayClient` 对象后：
+
+```csharp
+client.Configure(settings =>
+{
+    settings.HttpClientFactory = HttpClientFactory; // 赋值为依赖注入的 `IHttpClientFactory` 对象
+});
+```
+
+下面给出一个使用了依赖注入的完整例子：
+
+```csharp
+using System.Net.Http;
+using Microsoft.Extensions.Http;
+using Microsoft.Extensions.Options;
+using SKIT.FlurlHttpClient.Wechat.TenpayV3;
+using SKIT.FlurlHttpClient.Wechat.TenpayV3.Models;
+
+public class MyWechatClientFactory
+{
+    private readonly IHttpClientFactory _httpClientFactory;
+    private readonly IOptions<WechatTenpayClientOptions> _wechatTenpayClientOptions;
+
+    public MyWechatClient(
+        IHttpClientFactory httpClientFactory,
+        IOptions<WechatTenpayClientOptions> wechatTenpayClientOptions)
+    {
+        _httpClientFactory = httpClientFactory;
+        _wechatTenpayClientOptions = wechatTenpayClientOptions;
+    }
+
+    public WechatTenpayClient CreateClient()
+    {
+        var client = new WechatTenpayClient(_wechatTenpayClientOptions.Value);
+        client.Configure(settings => settings.HttpClientFactory = _httpClientFactory);
+
+        return client;
+    }
+}
+```