Hi ,
    I am facing an issue in .Net web Part and not able to get any solution for this issue.

    My problem is..
    I have a master page, I am loading a .ascx file to the master page by using WebPartZone. Its working fine and I am able to show
and hide WebParts based on roles.

But I want to replace with a new ascx file in the existing WebPartzone, when user hits on a button. (ie the page already loaded and I
want to replace the content of the WebPartzone with a new ascx file)

could you please help regarding the same?

Thanks & Regards,
Anurag