I have came across following when I was looking for .NET Persistance object
pattens

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• Implimentation of Facade Pattern


• id=_ctl0__ctl0__ctl0_Title1>href="http://developerland.com/CSharpGeneral/Database/372.aspx"
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  Objects Persistence Pattern for .NET by 
  href="http://developerland.com/CSharpGeneral/Database/Users_ShowProfile.aspx?user=sarah">Iqbal
  Khan