在C#中,下列代码描述正确的是:() class UserInfo { private string userNo; private string userPwd; public string UserNo { get; set; } public string UserPwd { get; set; } public UserInfo() { this.UserNo = "zhangsan"; this.userPwd = "123"; } } static void Main(string[] args) { UserInfo us = new UserInfo(); }
Aus.UserNo的值为null
Bus.UserPwd的值为"123"
Cus.UserNo的值为""
Dus.UserPwd的值为null
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