实体类绑定TEXTBOX

class Entity:INotifyPropertyChanged
{
    private string field;
    public string Field
    {
        get { return field; }
        set
        {
            field = value;
            SendChangeInfo("Field");
        }
    }

    private void SendChangeInfo(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
    #region INotifyPropertyChanged Members

    public event PropertyChangedEventHandler PropertyChanged;

    #endregion
}