I'm using version 3.7 and I'm after a way to make ContentPlaceHolder containers not accessable at the page edit level. That is, I have some ContentPlaceHolder in which I want to place controls at the template level, but I do not want cms users to be able to place further controls in those same containers at page level or to be able to remove the existing controls.
Now I could do something like the following in the template master page:
ContentPlaceHolder _somePlaceHolder = (ContentPlaceHolder)(
So that in edit or preview mode for a page the targeted ContentPlaceHolder is not visible. However, it still appears in the list of containers in which one can add controls, it just doesn't render on the page. Actually that is the opposite of the behaviour I would like to achieve. i.e. I want the controls placed in the ContentPlaceHolder at template level to render on the page in edit mode, I just don't want those ContentPlaceHolders to appear in the list of containers in which a user can add controls at page level edit mode.
Does that make sense? Is what I'm after possible?