Styling the controls in your project: pages node under system.web in Webconfig

For a detailed description of the following pages node in System.Web, MSDN above, see here.

The theme property under this pages node can set the style of the control in the project, directly referencing the skin file to set the style, without adding it to each page, to guarantee the consistency of the page style:

" Defaulttheme "  />

About the addition of theme:

Once the theme is created, create your own style under the App_Themes folder, which you can use directly inside pages.

Of course, if you want to add a custom style to a page, you can specify the page's theme in aspx.

The theme under pages in Webconfig overrides the style of the control, which can be reset in the page in ASPX theme overrides the Webconfig settings.

Styling the controls in your project: pages node under system.web in Webconfig