Note that the ContentPlaceHolderID attribute of the Content control points to the
ContentPlaceHolder that is defined in the master page. Right now it points to the default
name of ContentPlaceHolder1, but in a later exercise you see how to change this.
At run time, when the page is requested, the markup from the master page and the content page are
merged, processed, and sent to the browser. Figure 6-1 shows a diagram of the master page with
just one ContentPlaceHolder and the content page that results in the final page that is sent to the
browser.