This Post Details Content That I Have Written Regarding The SharePoint API On MSDN. The Full Article Will Have These Contents As Annotations Of The Full Article.

I Encourage You To Read The Full MSDN Class Documentation, Since Things Like Type Hierarchy Are Illustrated.

Adam Buenz – WSS MVP – Community Content From Annotations edited by Adam Buenz – MVP:

Description The Microsoft.SharePoint.SPBuiltInContentTypeId sealed class is useful for two distinct reasons. Firstly, it contains a series of static Microsoft.SharePoint.SPContentTypeId fields that characterize the default SharePoint content types

Read My Complete MSDN Article: SPBuiltInContentTypeId