Sharepoint SPWeb - MasterUrl vs CustomMasterUrl [closed]

Question

What is the difference between the MasterUrl and CustomMasterUrl in SPWeb please?

Answer 1

The best description comes from Site Settings > Look and Feel > Master Page in the SharePoint UI.

This is SPWeb.CustomMasterUrl:

Site Master Page

The site master page will be used by all publishing pages.

This is SPWeb.MasterUrl:

System Master Page

Use the system master page for all forms and view pages in this site.