[HttpException (0x80004005): 无法在母版页“/DefaultM.Master”中找到 ContentPlaceHolder“RightBody”,请验证内容页中内容控件的 ContentPlaceHolderID 特性。]
System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection) +603
System.Web.UI.Page.get_Master() +56
System.Web.UI.Page.ApplyMasterPage() +15
System.Web.UI.Page.PerformPreInit() +54
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +302
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