In the New Project dialog, select the XNA Game Studio 4.0 category and, from the list of installed templates, select Windows Phone Game (4.0); then set the name to CatapultGame and click OK.
Creating a new Windows Phone Game application project in Microsoft Visual Studio 2010
In Solution Explorer, review the structure of the solution generated by the Windows Phone Application template. A Visual Studio solution is a container for related projects; in this case, it contains an XNA Game Studio game for Windows Phone project named CatapultGame and a related game resource project named CatapultGameContent.
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