protected bool SetProperty<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(field, value))
            {
                return false;
            }

            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }


        protected bool SetProperty<T>(ref T field, T value, Expression<Func<T>> selectorExpression)
        {
            if (EqualityComparer<T>.Default.Equals(field, value))
            {
                return false;
            }

            field = value;
            OnPropertyChanged(selectorExpression);
            return true;
        }