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Xamarin.Forms device unique ID...

As in a lot of applications, you will probably need to get a unique identifier to identify a unique user . And it becomes a little more complicated when you have to deal with different platforms like Android, iOS and Windows Phone... Here is a simple solution that you can implement in Xamarin Forms that I found on this blog: http://codeworks.it/blog/?p=260 First define a service that you will use in your Xamarin Forms Application: // Your service interface definition public interface IDevice { string GetIdentifier(); } // How you get your service in your app IDevice device = DependencyService.Get (); string deviceIdentifier = device.GetIdentifier(); And here are the implementations for Android / Windows Phone and the most complicated, iOS platform: // WINDOWS PHONE [assembly: Xamarin.Forms.Dependency(typeof(WinPhoneDevice))] namespace XFUniqueIdentifier.WinPhone { public class WinPhoneDevice : IDevice { public string GetIdentifier() { byte[] myDeviceId = (...