Optimistic Concurrency with C# using the IOC and DI Design Patterns

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace WFrmAppIOC
{
    /// <summary>
    /// iDatabase - Abstract class for datbase providers. 
    /// </summary>
    public abstract class iDatabase
    {
        string strdbName;        // the database name
        string strServer;        // the database name
        string struserName;      // the user name
        string strpassword;      // the password 
        string strSAName;        // the SA user name
        string strSApassword;    // the SA password 
        /// <summary>
        /// iDatabase - constructor 
        /// </summary>
        public iDatabase()
        {
            strdbName = "";             // the database name
            strServer = "";             // the database name
            struserName = "";           // the user name
            strpassword = "";           // the password 
            strSAName = "";             // the SA user name
            strSApassword = "";         // the SA password 
        }
        /// <summary>
        /// DBName - get/set 
        /// </summary>
        public string DBName
        {
            get
            {
                return (strdbName);
            }
            set
            {
                strdbName = value;
            }
        }
        /// <summary>
        /// Server - get/set
        /// </summary>
        public string Server
        {
            get
            {
                return (strServer);
            }
            set
            {
                strServer = value;
            }
        }
        /// <summary>
        /// UserName - get/set
        /// </summary>
        public string UserName
        {
            get
            {
                return (struserName);
            }
            set
            {
                struserName = value;
            }
        }
        /// <summary>
        /// Password - get/set
        /// </summary>
        public string Password
        {
            get
            {
                return (strpassword);
            }
            set
            {
                strpassword = value;
            }
        }
        /// <summary>
        /// SAUserName - get/set
        /// </summary>
        public string SAUserName
        {
            get
            {
                return (strSAName);
            }
            set
            {
                strSAName = value;
            }
        }
        /// <summary>
        /// SAPassword - get/set
        /// </summary>
        public string SAPassword
        {
            get
            {
                return (strSApassword);
            }
            set
            {
                strSApassword = value;
            }
        }
        /// <summary>
        /// CheckDBConnectionInfo - cehk the db connection information
        /// </summary>
        public abstract void CheckDBConnectionInfo();
        /// <summary>
        /// GetUserPassword
        /// </summary>
        /// <param name="userName">User name</param>
        /// <returns>password</returns>
        public abstract string GetUserPassword(string userName);
        /// <summary>
        /// UpdateUser - update the user record.
        /// </summary>
        /// <param name="ud"></param>
        /// <returns></returns>
        public abstract int UpdateUser(UserData ud);
        /// <summary>
        /// AddUser - ass the user. 
        /// </summary>
        /// <param name="userName"></param>
        /// <param name="Password"></param>
        /// <param name="ModUser"></param>
        /// <returns></returns>
        public abstract int AddUser(string userName, string Password, string ModUser);
        /// <summary>
        /// GetUser
        /// </summary>
        /// <param name="userName"></param>
        /// <returns></returns>
        public abstract UserData GetUser(string userName);
    }
}