title: How can develop Windows C# App using BLE
body: <p>I'm trying to develop a windows app that communicate with bluetooth device.</p>
  
  <p>Now I have one bluetooth-usb dongle for my windows desktop and bluetooth BLE device.</p>
  
  <p>I want to develop the app using C# and Visual Studio in Windows 10.
  But I can't find official documents and APIs at all. There's no C# API about BLE in windows? If it is, How can I develop a C# App using BLE?</p>