void AddRuleSet(WebDom.CssRuleSet ruleset)
{
List<CssRuleSetGroup> relatedRuleSets = new List<CssRuleSetGroup>();
ExpandSelector(relatedRuleSets, ruleset.GetSelector());
CssPropertyAssignmentCollection assignmentCollection = new CssPropertyAssignmentCollection(null);
assignmentCollection.LoadRuleSet(ruleset);
foreach (var ruleSetGroup in relatedRuleSets)
{
//start with share*** rule set
ruleSetGroup.AddRuleSet(assignmentCollection);
}
}