How can I use System.Globalization.CultureInfo.GetCultures in PCL.

Dear all,
I have a question about System.Globalization.CultureInfo.GetCultures.
Please visit this url :

http://developer.xamarin.com/api/member/System.Globalization.CultureInfo.GetCultures(System.Globalization.CultureTypes)/

Is this support and including Xamarin PCL Class? How can I use it or not?

I already try PCL, but it's not support PCL.

Please advise me.
Thank you very much and have a good day.