i m new to sharepoint and confuse, where coding take place in sharepoint application as other normar asp.net application -

Sharepoints and bits are new to confusing,

I do not understand where Coding SharePoint is in the form of other ASP.NET application.

I have to create a page to add records to the database.

This is everything.

You may be interested in it, so you do not have to write these XML manifests and feature files.