Observable Class for UWP Data Binding

Observable.cs

public class Observable : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    protected void Changed([CallerMemberName]string propertyName = null)
    {
        var handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }

    protected void SetProperty<T>(ref T field, T val, [CallerMemberName]string propertyName = null)
    {
        if (object.Equals(field, val)) return;
        field = val;
        Changed(propertyName);
    }
}