no fm radio api found for windows phone 8.1 , and UWP and how trigger radio on/off
i found 'using Microsoft.Devices.Radio' but not works on windows phone 8.1 only works for windows phone 7
Yes, it is possible. Make a new project in Visual Studio for Windows Phone 8.0/8.1 Silverlight App after installing the installing the appropriate sdk.
and also create two project with win phone silverlight and class and another UWP and reference it in UWP app , now we able to use silverlight api in uwp