Hi .Net Developers , i found a good article at msdn.com .i think it so helpful for you to deeply understand [Application Architecture for .NET: Designing Applications and Services]

i finished reading it and it so so so helpful for me , so i hope all of you read it carefully

article : http://msdn2.microsoft.com/en-us/library/ms954595.aspx

note : nearly , i will post my service oriented architecture sample using c# according to the App Architecture and SOA