Validation, CSS, Text Editor, Options Dialog Box
This dialog box lets you specify settings for validation and error detection in the CSS editor.
To access this dialog box
In Microsoft Visual Web Developer, on the menu bar, choose Tools and then choose Options.
The Options dialog box opens.
In the left panel, expand the Text Editor node, expand the CSS node, and then choose Validation.
If you have configured your environment settings for Web development, this element is not available unless you select the Show all settings check box. For more information about environment settings, see How to: Change Select Settings.
Additional cascading style sheet (CSS) options can be found under the HTML Designer node, which is visible if the Show all settings check box is selected.