INotifyPropertyChanged with property expressions

NotifyPropertyBase.cs

public class NotifyPropertyBase : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged( Expression<Func<object>> propertyExpression )
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null) handler( this, new PropertyChangedEventArgs( GetPropertyName( propertyExpression ) ) );
        }
 
        private string GetPropertyName( Expression<Func<object>> propertyExpression )
        {
            var unaryExpression = propertyExpression.Body as UnaryExpression;
            var memberExpression = unaryExpression == null ? (MemberExpression)propertyExpression.Body : (MemberExpression)unaryExpression.Operand;
            var propertyName = memberExpression.Member.Name;
            return propertyName;
        }
    }

Usage.cs

private int _myProperty;
public int MyProperty
        {
            get { return _myProperty; }
            set
            {
                if (_myProperty == value) return;
                _myProperty = value;
                OnPropertyChanged( ( ) => MyProperty );
            }
        }