Overriding Razor views or templates using attributes
One easy way to specify a view is to place a DefaultView attribute on either a service method or on an entire service class, or both. The attribute placed on the service class can apply as a default, while an attribute placed on a service method can override this default.
Getting ready
DefaultView takes two different arguments, a view and optionally a template. This allows you to specify each separately to control the rendering of the page.
The template parameter allows you to specify one of multiple templates. In a small application, you might only have one _Layout.cshtml, which would get picked up by default, and so you would not need to specify it. In a larger application, you might have a template for a microsite, another template for the home page, and another template for a content page. This allows you to group together pages that have a similar look and feel into separate templates.
The view parameter allows you as a developer to...