题目内容

YouarecreatingaWindowsapplicationbyusingthe.NETFramework3.5.YoucreateaninstanceoftheBackgroundWorkercomponentnamedbackgroundWorker1toasynchronouslyprocesstimeconsumingreportsintheapplication.Youwritethefollowingcodesegmentintheapplication（Linenumbersareincludedforreferenceonly.）
Youneedtowriteacodesegmentthatreportstotheapplicationwhenthebackgroundprocessdetectsanyofthefollowingactions：
（1）Anexceptionisthrown
（2）Theprocessiscancelled
（3）Theprocessissuccessfullycompleted
Whichcodesegmentshouldyouinsert？（）

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