C#简单的问题

Question

public class AccountEntity
{
#region 变量定义
///<summary>
///用户ID
///</summary>
        private int userID ;
      
///<summary>
///性别
///</summary>
        private string userSex;
///<summary>
///邮箱
///</summary>
        private string userEmail;
        /// <summary>
        /// 地址
        /// </summary>
        private AddressEntity address;
      
///<summary>
///用户职位
///</summary>
        private string userJob;


///<summary>
///MSN
///</summary>
        private string userMSN;
///<summary>
///UserQQ
///</summary>
        private string userQQ;
///<summary>
///其他联系信息
///</summary>
        private string userOther;
///<summary>
///用户状态
///</summary>
        private int userState;
///<summary>
///登陆次数
///</summary>
        private int loginCount;
///<summary>
///创建时间
///</summary>
        private DateTime createTime;
///<summary>
///最后活跃时间
///</summary>
        private DateTime lastActivityDate;
private System.Collections.Specialized.NameValueCollection otherinfo;
#endregion

#region 构造函数
///<summary>
///
///</summary>
public AccountEntity()
{
otherinfo = new System.Collections.Specialized.NameValueCollection();
            string userName = String.Empty;
            string userSex = String.Empty;
            string userEmail = String.Empty;
            AddressEntity address;
            string userJob = String.Empty;
            string userMSN = String.Empty;
            string userQQ = String.Empty;
            string userOther = String.Empty;
            int userState=0;
            int loginCount=0;
            DateTime createTime=System.DateTime.Now;
            DateTime lastActivityDate=System.DateTime.Now;
        }
///<summary>
///
///</summary>
public AccountEntity
(
int userID ,  
string userSex,
string userEmail,
    AddressEntity address,
string userJob,
 
string userMSN,
string userQQ,
string userOther,
int userState,
int loginCount,
 
DateTime lastActivityDate
)
{
            this.userID = userID;
         
            this.userSex = userSex;
            this.userEmail = userEmail;
            this.address = address;            this.userJob = userJob;            this.userMSN = userMSN;
            this.userQQ = userQQ;
            this.userOther = userOther;
            this.userState = userState;
            this.loginCount = loginCount;
          
            this.lastActivityDate = lastActivityDate;

}
#endregion

#region 公共属性

///<summary>
///用户ID
///</summary>
        public int  UserID
{
            get { return userID; }
            set { userID = value; }
}
      
        public AddressEntity Address
        {
            get { return address; }
            set { address = value; }
        }
///<summary>
///性别
///</summary>
public string UserSex
{
get {return userSex;}
set {userSex = value;}
} ///<summary>
///邮箱
///</summary>
public string UserEmail
{
get {return userEmail;}
set {userEmail = value;}
}  
///<summary>
///用户职位
///</summary>
public string UserJob
{
get {return userJob;}
set {userJob = value;}
}   ///<summary>
///MSN
///</summary>
public string UserMSN
{
get {return userMSN;}
set {userMSN = value;}
} ///<summary>
///UserQQ
///</summary>
public string UserQQ
{
get {return userQQ;}
set {userQQ = value;}
} ///<summary>
///其他联系信息
///</summary>
public string UserOther
{
get {return userOther;}
set {userOther = value;}
} ///<summary>
///用户状态
///</summary>
public int UserState
{
get {return userState;}
set {userState = value;}
} ///<summary>
///登陆次数
///</summary>
public int LoginCount
{
get {return loginCount;}
set {loginCount = value;}
} ///<summary>
///创建时间
///</summary>
public DateTime CreateTime
{
get {return createTime;}
set {createTime = value;}
} ///<summary>
///最后活跃时间
///</summary>
public DateTime LastActivityDate
{
get {return lastActivityDate;}
set {lastActivityDate = value;}
}
///<summary>
///NameValueCollection閿€煎
///</summary>
public System.Collections.Specialized.NameValueCollection OtherInfo
        {
            set { otherinfo = value; }
            get { return otherinfo; }
        }
#endregion

}
AccountEntity acc=new AccountEntity();
acc.UserID=12;