Many of us want to use CSS 3.0. This feature is promised in Visual Studio 2010 however if you open any given CSS file, the option does not appear in the dropdown. So I decided to write this WIKI to help.
1. Open this link to download the CSS 3.0 installer. Click Here
2. The next step is equally important. Open the registry editor and do the following:
2a. Find: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\9.0\Packages\{A764E895-518D-11d2-9A89-00C04F79EFC3}\Schemas
2b. From there add a Key: Schema 5
2c. Add two string values
Keyname: File
Value: css30.xml
Keyname: Friendly Name
Value: CSS 3.0
3. Make sure css30.xml is located in C:\program files\Microsoft Visual Studio 10.0\common7\packages\1033\schemas\css
4. In there you will find css.xsd, css10,css20,css21, and css-ie60. If you don't find CSS30.xml in this folder use windows search and copy the css30.xml file into this folder
5. Restart VS and open any given CSS file. Select CSS 3.0 and it should have CSS 3.0 validation enabled.
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