Which control add in Master Page to define region?

I am developing an ASP.NET Web application. I create a master page. The master page requires a region where i can add page-specific content by using the ASP.NET page designer. I need to add a control to the master page to define the re开发者_开发百科gion. Which control should I add?

ContentPlaceHolder or PlaceHolder?

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ContentPlaceHolder is specifically for use on master pages to hold page-specific content. PlaceHolder is for use on content pages.

Use ContentPlaceHolder.