BaseStyles.css, BaseStyles.LeftToRight.css, BaseStyles.RightToRight.css and Styles.css are updated to support .NET themes.
During migration, BaseStyles.css, BaseStyles.LeftToRight.css, and BaseStyles.RightToRight.css are removed from the Styles folder. Any changes you have made to these CSS style sheet files will be lost.
A new updated version of BaseStyles.css is copied into your application’s App_Themes folder. Your application’s existing Styles.css file is moved from the Styles folder into the App_Themes folder.
Nothing if your style sheet customizations are in Styles.css; this file is preserved and Iron Speed Designer updates your application automatically.
After migration, re-apply any changes you may have made to your application’s original BaseStyles.css style sheet files to Styles.css. We strongly encourage you to place your CSS style sheet customizations in Styles.css, which is not affected by the migration process.
Version 6.2 Application Migration