[NullReferenceException: Object reference not set to an instance of an object.]
Song.Site.CourseBuy.InitPageTemplate(HttpContext context) in E:\SourceCode\01_LearningSystem\培训考试系统\Song.Site\CourseBuy.ashx.cs:47
Song.Site.BasePage.ProcessRequest(HttpContext context) in E:\SourceCode\01_LearningSystem\培训考试系统\Song.Site\BasePage.cs:232
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +341
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69
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