高手青帮忙啊！万分感谢

编写一个用户管理的类，因本人初学.net，请高手帮忙啊！
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;namespace User
{
    public class User
    {
        private int userID;
        private string userName;
        private int userPow;
    
        public int UserID
        {
            get
            {
                return UserID;
            }
            set
            {
                value = UserID ;
            }
        }        public string UserName
        {
            get
            {
                return UserName;
            }
            set
            {
                value = UserName;
            }
        }        public string UserPassword
        {
            get
            {
                return UserPassword;
            }
            set
            {
                value = UserPassword;
            }
        }        public int UserPow
        {
            get
            {
                return UserPow;
            }
            set
            {
                value = UserPow;
            }
        }        /// <summary>
        /// 用户名不可重复，否则提示一下
        /// </summary>
        public bool UserAdd(string _userName, string _userPassword, int _userPow)
        { 
                        
               
            
        }        public bool UserDelete(string _userID)
        {
           
        }        /// <summary>
        /// 修改管理权限,依据为id
        /// </summary>
        public bool ChangePower(string _userID, int _NewPow)
        {
           
        }        /// <summary>
        /// 用户验证，若成功并且写入日志，要应用相关的Log属性和方法；最后返回该管理员相应的权限
        /// </summary>
        public int UserLogin(string _userName, string _userPassword)
        {
            
        }        /// <summary>
        /// 获得该用户的相关信息
        /// </summary>
        public DataRow UserRefer(string _userName)
        {
           
        }        /// <summary>
        /// 重载函数
        /// </summary>
        public DataRow UserRefer(int _UserID)
        {
        }        public bool ChangPassword(int _ID, string _oldPassword, string _newPassword)
        {
            
        }        public string GetPassword(int _id)
        {
            
        }
    }
}