在没有魔术字符串的情况下实现NotifyPropertyChanged

public abstract class NotifyPropertyChangedBase : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    protected void NotifyPropertyChanged<T>(Expression<Func<T>> propertyExpression)
    {
        if (PropertyChanged == null) return;

        var memberExpression = (MemberExpression)propertyExpression.Body;
        var propertyName = memberExpression.Member.Name;

        PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

public class Person : NotifyPropertyChangedBase
{
    private string name;

    public string Name
    {
        get { return name; }
        set
        {
            name = value;
            NotifyPropertyChanged(() => Name);
        }
    }
}