How to tie Knots

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Content placeholder controls indicate regions of replaceable content on the master page. They appear in Code view as <asp:ContentPlaceHolder> and are mapped to their respective content placeholder controls by the contentplaceholderid attribute. The content placeholders define default content for the region defined by the content placeholder control. The default content defined by content placeholders can be modified within the master page so that the changes appear on every page to which the master page is attached.


In addition, content controls (which appear in Code view as <asp:Content>) can be used in an individual content page to override the default content for the content placeholder that is supplied by the master page.

A content region is the region of a master page defined by a single content placeholder.

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