Here Dino Esposito and Andrea Saltarello cover the plumbing of the Membership API and its inherently extensible nature, based on pluggable providers. To demonstrate the features, they take an existing ASP.NET 1.x authentication mechanism and port it to ASP.NET 2.0, exposing the legacy authentication mechanism through the new Membership API.
Dino Esposito and Andrea Saltarello
MSDN Magazine November 2005
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