plz help me a simple example to scan, connect and send data to a bluetooth device with Xamarin.Form

Hi all, i want to develop a simple app with requirement below:
1) scan, connect and send some simple data (number, character) to a bluetooth device
2) cross platform
I searched for a long time, and read more in this forum,... but i can't implement for my project. Plz help me some simple example about this topic, many thanks and sorry about my grammar english.