#region using Statements
using System;
using System.Text;
using System.Collections.Generic;
using SetFocus.Library.DataAccess;
using SetFocus.Library.Entities;
using System.Text.RegularExpressions;

#endregion using Statements

namespace LibraryManagementApplication
{

    /// <summary>
    /// The LibraryMiddleTeir Class Library is a Class that implements
    /// IDataAccess. It's primary purpose is to perform the checks on
    /// the business logic of the Library's Operating Policies as well
    /// as validate the data before it is entered into the DataAccess
    /// Data Store. Any errors will passed back to the front end
    /// application to be interogated and have errors raised in a format
    /// the user can understand and correct. This separation of business
    /// logic from the front end forms application. Creates a more
    /// abstract application for easier updates in the case that the
    /// business rules or functionality of the application requires Change.
    /// </summary>
    class LibraryMiddleTier : IDataAccess
    {
        LibraryDataAccess x = new LibraryDataAccess();

        /// <summary>
        /// Default Constructor gives Access to Static and non Static
        /// Methods responsible for data validation and communication
        /// with the Library DataBase through the IDataAccess Interface.
        /// </summary>
        public LibraryMiddleTier()
        {