10. Layers
HTTP
URL
ADO.NET Data Services
METHOD
http://[site]:[port]/coolmail.svc/Mails(guid'id')
LINQ to
Entity Framework
Entities
var result = (from m in Mails
where m.Id=new Guid('id')
select m).First();
SQL
SQL Server
SELECT m.Id, m.Sent, m.Subject, m.Sender
FROM Mails
WHERE m.Id = ‘id’