public CreateSampleDataCommand(Action<string> output)
{
this.output = output;
database = ApplicationModel.Current.Server.Value.SelectedDatabase;
databaseChanged = database
.ObservePropertyChanged()
.Select(e => Unit.Default);
databaseChanged
.SubscribeWeakly(this, (target, d) => target.HandleDatabaseChanged(target.database.Value));
SubscribeToStatisticsChanged(database.Value);
}