The relationship between--layout and Viewstart and page index in MVC

1, _viewstart.cshtml page is the whole MVC, it is bound to load, it is in general ordinary page, such as Index.cshtml page before loading.

2, _viewstart.cshtml initial load page, the top of the page will generally contain

@{
Layout = "~/views/shared/_layout.cshtml";
}

_layout.cshtml This layout page

3, so _viewstart.cshtml, _layout.cshtml, index.cshtml three page load time sequence is:

_layout.cshtml top priority, followed by _viewstart.cshtml, the last is the normal content page index.cshtml