private void Form1_Load(object sender, EventArgs e)
{
//说明这个字段确实是使用Date公共属性访问到了date私有变量
CalendarEntry calendarEntry = new CalendarEntry();
calendarEntry.Date = Convert.ToDateTime("1996,11,11");
lblTest.Text = calendarEntry.Date.ToString();
CalendarEntry calendar = new CalendarEntry();
calendar.SetDate("1988,6,7");
lblSet.Text = calendar.Date.ToString();
CalendarEntry birthday = new CalendarEntry();
birthday.day = "Saturday";
}