Asp.Net RDLC performance issue

I was recently worked on very interesting issue in RDLC.Few months back the Asp.net application migrated from 3.5 to 4.6 and deployed in the production and working good.Recently few users are reported, page not responding to any action on the page even cancel button click in the application.Started  investigating on the issue.Initial i was think it may  due to data but later on  due to migration and the solution is to add below value in web.config.

      <trust legacyCasModel=”true” level=”Full”/>

Report Designer for Visual Studio 2017

Working with new version of the IDE is always excitement because exploring on the new things.I am working on the migrated project from .net framework 3.5 to 4.6 in visual studio 2017.While opening the RDLC file it’s open XML designer instead of the RDLC designer. I have checked in the internet found RDLC is not installed in my visual studio 2017.Report designer downloaded from the visual studio marketplace from below link.

Download