In Web site development with ASP.NET, the Master Page can contain a ContentPlaceHolder control that is used to define a region of the Master Page rendering that can be substituted with content from a page associated to the Master Page.
In Web site development with ASP.NET, the Master Page can contain a ContentPlaceHolder control that is used to define a region of the Master Page rendering that can be substituted with content from a page associated to the Master Page.