test.cs

// Retrieve installation from local storage and
// create new one if it does not exist
var installation = SettingsHelper.Installation;
if (installation == null)
{
  installation = new Installation
  {
    InstallationId = Guid.NewGuid().ToString(),
    Platform = NotificationPlatform.Wns,
    PushChannel = pushNotificationChannel.ToString(),
    Tags = new List<string> {“news", "sports"}
  };
}