If Visual Studio 2005 is set to Treat all warnings as error, with warning level 4 (which both are good practices) you will get a LOT of error for any CSS-properties that is defined by you. This has to do with that no XML-schema exists to validate those properties for the .css-file.
However there is a setting in Visual Studio 2005 that will help you to get rid of those errors. Under Tools->Options->Text Editor->CSS->CSS Specific the dialog to the right can be found.
Simply uncheck the "Detect unknown properties" and the errors a but a memory from the past.
The "formally correct" solution would have been to include a XML-schema that validates the properties used in the css-file. Two problems though:
- How do you point the xml-schema to the css-stylesheet?
- Who has the time to keep that schema up to date just to get rid of the errors?
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