我正在编写一个自定义OWIN中间件来记录所有http请求及其响应。我想将这些与trackingId“相关联”。这是代码:publicclassPacketTrackingMiddleware{privatereadonlyAppFunc_next;publicPacketTrackingMiddleware(AppFuncnext){_next=next;}publicasyncTaskInvoke(IDictionaryenvironment){IOwinContextcontext=newOwinContext(environment);varrequest=context.Req