ASP.NET Core控制台应用无法添加Application Insight遥测问题求助

AddApplicationInsightsTelemetry() 是ASP.NET Core专属的扩展方法，来自Microsoft.ApplicationInsights.AspNetCore包，内部依赖Web应用运行时默认注入的HTTP上下文、环境服务等依赖项，控制台应用没有内置这些服务，所以会抛出服务未找到的异常，这就是相同配置在Web API项目正常、控制台项目报错的核心原因。

1. 首先安装控制台/后台服务专用的Application Insights NuGet包：
   Microsoft.ApplicationInsights.WorkerService

2. 修改服务注册逻辑，将原有的AddApplicationInsightsTelemetry替换为适配非Web场景的AddApplicationInsightsTelemetryWorkerService，修改后的代码示例如下：

private static IHostBuilder CreateHostBuilder(string[] args)
{
    return Host.CreateDefaultBuilder(args)
        .ConfigureServices(services =>
        {
            services.AddTransient<Program>();
            HttpManager manager = new HttpManager(Configuration);
            SqlManager sqlManager = new SqlManager(Configuration);
            EngineFunctions engineFunctions = new EngineFunctions();
            EngineManager engineManager = new EngineManager(sqlManager, engineFunctions);
            WorkOrderFunctions workOrderFunctions = new WorkOrderFunctions();
            ServiceBusManager serviceBusManager = new ServiceBusManager(Configuration);
            WorkOrderService wservice = new WorkOrderService(manager, sqlManager, workOrderFunctions, engineManager, serviceBusManager);
            services.AddSingleton(wservice);

            string instrumentationKey = Configuration["APPINSIGHTS_INSTRUMENTATIONKEY"];
            // 替换原Web场景专用的注册方法
            services.AddApplicationInsightsTelemetryWorkerService(instrumentationKey);
        });
}

3. （可选）自定义日志采集规则，可通过配置TelemetryConfiguration实现，例如调整采样率、添加自定义遥测初始化器：

services.Configure<TelemetryConfiguration>(config =>
{
    // 采样率设为100%，全量上报日志
    config.TelemetryProcessorChainBuilder.UseSampling(100);
    // 添加自定义遥测初始化器，可统一给日志加公共属性
    config.TelemetryInitializers.Add(new CustomTelemetryInitializer());
});

配置完成后，注入TelemetryClient可手动上报事件、异常、指标，通过ILogger接口输出的日志也会自动同步到Azure Application Insights，使用逻辑和Web API项目完全一致。

内容的提问来源于stack exchange，提问作者OguzKaanAkyalcin