Build me 2 simple programs

os:
Windows 10/vs 2015

I want an app that can send a phone number from my Windows PC to my mobile phone to make a call from my mobile phone.
(server running on mobile)

1. sent phone number from pc to mobile phone (with C#)
2. Make a call directly from the mobile to the phone number received from the PC. (with android)
Android apps need memory management because they need to run in the background for a long time.

I want the source code of the above two