File list (Check if you may need any files):
Layered\4-Tier\Default.aspx
.......\......\Default.aspx.cs
.......\......\Default2.aspx
.......\......\Default2.aspx.cs
.......\......\images\4-tiers.GIF
.......\......\......\insert4-tier.GIF
.......\......\......\list4-tier.GIF
.......\......\......\Thumbs.db
.......\......\List.aspx
.......\......\List.aspx.cs
.......\App_Code\BAL\PersonBAL.cs
.......\........\.O\Person.cs
.......\........\DAL\PersonDAL.cs
.......\....Data\Database.mdf
.......\........\Database_log.LDF
.......\Web.config
.......\4-Tier\images
.......\App_Code\BAL
.......\........\BO
.......\........\DAL
.......\4-Tier
.......\App_Code
.......\App_Data
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