I am looking for SDL Tridion documentation for ASP.net MVC c# integration.
Where they explain the services used by Tridion and their page, components, templates, and content life cycle. Also the DD4T details.
You can find official Tridion Sites documentation on following link https://docs.rws.com/publications/Tridion%20Sites/
And DD4T information can be found on following links https://dd4t.org/ and https://github.com/dd4t