FromBluetoothAddressAsync IAsyncOperation does not contain a definition for ‘GetAwaiter’ error

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To await an IAsyncOperation, you need two things:

  • A reference to C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5\System.Runtime.WindowsRuntime.dll
  • A reference to C:\Program Files (x86)\Windows Kits\10\UnionMetadata\Facade\Windows.WinMD

If either reference is missing then it won’t work. You can also use the UwpDesktop nuget package, that will do the work for you.

Note: specifically GetAwaiter is extension in System namespace that is available from those references (you still need using System; – make sure you have not removed it from the file). The extension info is on MSDN – WindowsRuntimeSystemExtensions.GetAwaiter.

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