iBeacon Windows 10 Console Application using C#

iBeacon-Windows10-C#-Program.cs

using System;
using System.Linq;
using Windows.Devices.Bluetooth.Advertisement;
using Windows.Storage.Streams;

namespace BeaconExample
{
    class Program
    {
        private class BeaconData
        {
            public Guid Uuid { get; set; }
            public ushort Major { get; set; }
            public ushort Minor { get; set; }
            public sbyte TxPower { get; set; }
            public static BeaconData FromBytes(byte[] bytes)
            {
                if (bytes[0] != 0x02) { throw new ArgumentException("First byte in array was exptected to be 0x02", "bytes"); }
                if (bytes[1] != 0x15) { throw new ArgumentException("Second byte in array was expected to be 0x15", "bytes"); }
                if (bytes.Length != 23) { throw new ArgumentException("Byte array length was expected to be 23", "bytes"); }
                return new BeaconData
                {
                    Uuid = new Guid(
                            BitConverter.ToInt32(bytes.Skip(2).Take(4).Reverse().ToArray(), 0),
                            BitConverter.ToInt16(bytes.Skip(6).Take(2).Reverse().ToArray(), 0),
                            BitConverter.ToInt16(bytes.Skip(8).Take(2).Reverse().ToArray(), 0),
                            bytes.Skip(10).Take(8).ToArray()),
                    Major = BitConverter.ToUInt16(bytes.Skip(18).Take(2).Reverse().ToArray(), 0),
                    Minor = BitConverter.ToUInt16(bytes.Skip(20).Take(2).Reverse().ToArray(), 0),
                    TxPower = (sbyte)bytes[22]
                };
            }
            public static BeaconData FromBuffer(IBuffer buffer)
            {
                var bytes = new byte[buffer.Length];
                using (var reader = DataReader.FromBuffer(buffer))
                {
                    reader.ReadBytes(bytes);
                }
                return BeaconData.FromBytes(bytes);
            }
        }

        static void Main(string[] args)
        {
            var watcher = new BluetoothLEAdvertisementWatcher();
            watcher.Received += Watcher_Received;
            watcher.Start();
            Console.WriteLine("Bluetooth LE Advertisement Watcher Started (Press ESC to exit)");
            while (Console.ReadKey().Key != ConsoleKey.Escape)
            {
            }
            watcher.Stop();
            Console.WriteLine("Bluetooth LE Advertisement Watcher Stopped");
        }

        private static void Watcher_Received(BluetoothLEAdvertisementWatcher sender, BluetoothLEAdvertisementReceivedEventArgs args)
        {
            const ushort AppleCompanyId = 0x004C;
            foreach (var adv in args.Advertisement.ManufacturerData.Where(x => x.CompanyId == AppleCompanyId))
            {
                var beaconData = BeaconData.FromBuffer(adv.Data);
                Console.WriteLine(
                    "[{0}] {1}:{2}:{3} TxPower={4}, Rssi={5}",
                    args.Timestamp,
                    beaconData.Uuid,
                    beaconData.Major,
                    beaconData.Minor,
                    beaconData.TxPower,
                    args.RawSignalStrengthInDBm);
            }
        }
    }
}

Severity Code Description Project File Line Suppression State
Error CS0246 The type or namespace name 'BluetoothLEAdvertisementWatcher' could not be found (are you missing a using directive or an assembly reference?) BeaconExample C:\Users\cmu\source\repos\BeaconExample\BeaconExample\Program.cs 46 Active

Severity Code Description Project File Line Suppression State
Error CS0246 The type or namespace name 'BluetoothLEAdvertisementReceivedEventArgs' could not be found (are you missing a using directive or an assembly reference?) BeaconExample C:\Users\cmu\source\repos\BeaconExample\BeaconExample\Program.cs 57 Active

Severity Code Description Project File Line Suppression State
Error CS0103 The name 'DataReader' does not exist in the current context BeaconExample C:\Users\cmu\source\repos\BeaconExample\BeaconExample\Program.cs 36 Active

Thanks for this example! After rewriting it a bit for my own purposes it worked great.

FYI: If anyone tries running the above code as a Console App (.Net Core) in Microsoft Visual Studio, make sure you add the required references as explained in this post: https://stackoverflow.com/questions/53268156/is-universal-windows-platform-required-to-use-the-windows-devices-bluetooth-name
In my own case the first reference was actually here: "C:\Program Files (x86)\Windows Kits\10\UnionMetadata\10.0.18362.0\Windows.winmd"