[HttpException (0x80004005): Server cannot set content type after HTTP headers have been sent.]
   System.Web.HttpResponse.set_Charset(String value) +110
   NSW.Admin.Tools.AdminTools.Context_PostReleaseRequestState(HttpContext Context, EventArgs e) +1790
   NSW.Web.UI.UserPages.OnPreLoad(EventArgs e) +102
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2337