title: SettingsPane not found in Windows 10 build
body: <p>I am building a new Windows 10 UWP (Universal Windows Platform) app using Visual Studio 2015.  Actually I am porting my Windows 8.1 app, but I did so by creating a whole new project and manually pulling in each class.</p>
  
  <p>My app is failing to build with the following error:</p>
  
  <p>The type or namespace name 'SettingsPane' could not be found (are you missing a using directive or an assembly reference?)</p>
  
  <p>The C# file in question does have a <strong>using</strong> statement for <strong>Windows.UI.ApplicationSettings</strong>, and I also get the error even if I try to fully qualify SettingsPane as Windows.UI.ApplicationSettings.SettingsPane.</p>
  
  <p>According to <a href="https://msdn.microsoft.com/en-us/library/windows/apps/windows.ui.applicationsettings.settingspane.aspx" rel="noreferrer">this</a>, SettingsPane should be available to Win10 apps, in the namespace I mentioned.</p>
  
  <p>So the question is: why is my app failing to build?  Am I missing a dll, or just not understanding something else?</p>